2108 lines
77 KiB
Plaintext
2108 lines
77 KiB
Plaintext
#####################################################
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### main/01_exim4-config_listmacrosdefs
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#####################################################
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######################################################################
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# Runtime configuration file for Exim 4 (Debian Packaging) #
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######################################################################
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######################################################################
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# /etc/exim4/exim4.conf.template is only used with the non-split
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# configuration scheme.
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# /etc/exim4/conf.d/main/01_exim4-config_listmacrosdefs is only used
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# with the split configuration scheme.
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# If you find this comment anywhere else, somebody copied it there.
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# Documentation about the Debian exim4 configuration scheme can be
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# found in /usr/share/doc/exim4-base/README.Debian.gz.
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######################################################################
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######################################################################
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# MAIN CONFIGURATION SETTINGS #
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######################################################################
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# Just for reference and scripts.
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# On Debian systems, the main binary is installed as exim4 to avoid
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# conflicts with the exim 3 packages.
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exim_path = /usr/sbin/exim4
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# Macro defining the main configuration directory.
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# We do not use absolute paths.
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.ifndef CONFDIR
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CONFDIR = /etc/exim4
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.endif
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# debconf-driven macro definitions get inserted after this line
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UPEX4CmacrosUPEX4C = 1
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# Create domain and host lists for relay control
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# '@' refers to 'the name of the local host'
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# List of domains considered local for exim. Domains not listed here
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# need to be deliverable remotely.
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domainlist local_domains = MAIN_LOCAL_DOMAINS
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# List of recipient domains to relay _to_. Use this list if you're -
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# for example - fallback MX or mail gateway for domains.
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domainlist relay_to_domains = MAIN_RELAY_TO_DOMAINS
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# List of sender networks (IP addresses) to _unconditionally_ relay
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# _for_. If you intend to be SMTP AUTH server, you do not need to enter
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# anything here.
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hostlist relay_from_hosts = MAIN_RELAY_NETS
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# Decide which domain to use to add to all unqualified addresses.
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# If MAIN_PRIMARY_HOSTNAME_AS_QUALIFY_DOMAIN is defined, the primary
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# hostname is used. If not, but MAIN_QUALIFY_DOMAIN is set, the value
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# of MAIN_QUALIFY_DOMAIN is used. If both macros are not defined,
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# the first line of /etc/mailname is used.
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.ifndef MAIN_PRIMARY_HOSTNAME_AS_QUALIFY_DOMAIN
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.ifndef MAIN_QUALIFY_DOMAIN
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qualify_domain = ETC_MAILNAME
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.else
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qualify_domain = MAIN_QUALIFY_DOMAIN
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.endif
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.endif
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# listen on all all interfaces?
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.ifdef MAIN_LOCAL_INTERFACES
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local_interfaces = MAIN_LOCAL_INTERFACES
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.endif
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.ifndef LOCAL_DELIVERY
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# The default transport, set in /etc/exim4/update-exim4.conf.conf,
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# defaulting to mail_spool. See CONFDIR/conf.d/transport/ for possibilities
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LOCAL_DELIVERY=mail_spool
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.endif
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# The gecos field in /etc/passwd holds not only the name. see passwd(5).
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gecos_pattern = ^([^,:]*)
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gecos_name = $1
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# define macros to be used in acl/30_exim4-config_check_rcpt to check
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# recipient local parts for strange characters.
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# This macro definition really should be in
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# acl/30_exim4-config_check_rcpt but cannot be there due to
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# http://www.exim.org/bugzilla/show_bug.cgi?id=101 as of exim 4.62.
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# These macros are documented in acl/30_exim4-config_check_rcpt,
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# can be changed here or overridden by a locally added configuration
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# file as described in README.Debian section "Using Exim Macros to control
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# the configuration".
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.ifndef CHECK_RCPT_LOCAL_LOCALPARTS
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CHECK_RCPT_LOCAL_LOCALPARTS = ^[.] : ^.*[@%!/|`#&?]
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.endif
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.ifndef CHECK_RCPT_REMOTE_LOCALPARTS
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CHECK_RCPT_REMOTE_LOCALPARTS = ^[./|] : ^.*[@%!`#&?] : ^.*/\\.\\./
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.endif
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# always log tls_peerdn as we use TLS for outgoing connects by default
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.ifndef MAIN_LOG_SELECTOR
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MAIN_LOG_SELECTOR = +smtp_protocol_error +smtp_syntax_error +tls_certificate_verified +tls_peerdn
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.endif
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#####################################################
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### end main/01_exim4-config_listmacrosdefs
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#####################################################
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#####################################################
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### main/02_exim4-config_options
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#####################################################
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### main/02_exim4-config_options
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#################################
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# Defines the access control list that is run when an
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# SMTP MAIL command is received.
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#
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.ifndef MAIN_ACL_CHECK_MAIL
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MAIN_ACL_CHECK_MAIL = acl_check_mail
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.endif
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acl_smtp_mail = MAIN_ACL_CHECK_MAIL
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# Defines the access control list that is run when an
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# SMTP RCPT command is received.
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#
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.ifndef MAIN_ACL_CHECK_RCPT
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MAIN_ACL_CHECK_RCPT = acl_check_rcpt
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.endif
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acl_smtp_rcpt = MAIN_ACL_CHECK_RCPT
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# Defines the access control list that is run when an
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# SMTP DATA command is received.
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#
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.ifndef MAIN_ACL_CHECK_DATA
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MAIN_ACL_CHECK_DATA = acl_check_data
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.endif
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acl_smtp_data = MAIN_ACL_CHECK_DATA
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# Message size limit. The default (used when MESSAGE_SIZE_LIMIT
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# is unset) is 50 MB
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.ifdef MESSAGE_SIZE_LIMIT
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message_size_limit = MESSAGE_SIZE_LIMIT
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.endif
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# If you are running exim4-daemon-heavy or a custom version of Exim that
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# was compiled with the content-scanning extension, you can cause incoming
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# messages to be automatically scanned for viruses. You have to modify the
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# configuration in two places to set this up. The first of them is here,
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# where you define the interface to your scanner. This example is typical
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# for ClamAV; see the manual for details of what to set for other virus
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# scanners. The second modification is in the acl_check_data access
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# control list.
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# av_scanner = clamd:/var/run/clamav/clamd.ctl
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# For spam scanning, there is a similar option that defines the interface to
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# SpamAssassin. You do not need to set this if you are using the default, which
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# is shown in this commented example. As for virus scanning, you must also
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# modify the acl_check_data access control list to enable spam scanning.
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# spamd_address = 127.0.0.1 783
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# Domain used to qualify unqualified recipient addresses
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# If this option is not set, the qualify_domain value is used.
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# qualify_recipient = <value of qualify_domain>
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# Allow Exim to recognize addresses of the form "user@[10.11.12.13]",
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# where the domain part is a "domain literal" (an IP address) instead
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# of a named domain. The RFCs require this facility, but it is disabled
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# in the default config since it is rarely used and frequently abused.
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# Domain literal support also needs a special router, which is automatically
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# enabled if you use the enable macro MAIN_ALLOW_DOMAIN_LITERALS.
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# Additionally, you might want to make your local IP addresses (or @[])
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# local domains.
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.ifdef MAIN_ALLOW_DOMAIN_LITERALS
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allow_domain_literals
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.endif
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# Do a reverse DNS lookup on all incoming IP calls, in order to get the
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# true host name. If you feel this is too expensive, the networks for
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# which a lookup is done can be listed here.
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.ifndef DC_minimaldns
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.ifndef MAIN_HOST_LOOKUP
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MAIN_HOST_LOOKUP = *
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.endif
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host_lookup = MAIN_HOST_LOOKUP
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.endif
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# In a minimaldns setup, update-exim4.conf guesses the hostname and
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# dumps it here to avoid DNS lookups being done at Exim run time.
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.ifdef MAIN_HARDCODE_PRIMARY_HOSTNAME
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primary_hostname = MAIN_HARDCODE_PRIMARY_HOSTNAME
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.endif
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# The settings below cause Exim to make RFC 1413 (ident) callbacks
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# for all incoming SMTP calls. You can limit the hosts to which these
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# calls are made, and/or change the timeout that is used. If you set
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# the timeout to zero, all RFC 1413 calls are disabled. RFC 1413 calls
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# are cheap and can provide useful information for tracing problem
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# messages, but some hosts and firewalls have problems with them.
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# This can result in a timeout instead of an immediate refused
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# connection, leading to delays on starting up SMTP sessions.
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# (The default was reduced from 30s to 5s for release 4.61. and to
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# disabled for release 4.86)
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#
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#rfc1413_hosts = *
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#rfc1413_query_timeout = 5s
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# Enable an efficiency feature. We advertise the feature; clients
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# may request to use it. For multi-recipient mails we then can
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# reject or accept per-user after the message is received.
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#
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prdr_enable = true
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# When using an external relay tester (such as rt.njabl.org and/or the
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# currently defunct relay-test.mail-abuse.org, the test may be aborted
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# since exim complains about "too many nonmail commands". If you want
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# the test to complete, add the host from where "your" relay tester
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# connects from to the MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS macro.
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# Please note that a non-empty setting may cause extra DNS lookups to
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# happen, which is the reason why this option is commented out in the
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# default settings.
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# MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS = !rt.njabl.org
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.ifdef MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS
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smtp_accept_max_nonmail_hosts = MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS
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.endif
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# By default, exim forces a Sender: header containing the local
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# account name at the local host name in all locally submitted messages
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# that don't have the local account name at the local host name in the
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# From: header, deletes any Sender: header present in the submitted
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# message and forces the envelope sender of all locally submitted
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# messages to the local account name at the local host name.
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# The following settings allow local users to specify their own envelope sender
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# in a locally submitted message. Sender: headers existing in a locally
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# submitted message are not removed, and no automatic Sender: headers
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# are added. These settings are fine for most hosts.
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# If you run exim on a classical multi-user systems where all users
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# have local mailboxes that can be reached via SMTP from the Internet
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# with the local FQDN as the domain part of the address, you might want
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# to disable the following three lines for traceability reasons.
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.ifndef MAIN_FORCE_SENDER
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local_from_check = false
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local_sender_retain = true
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untrusted_set_sender = *
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.endif
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# By default, Exim expects all envelope addresses to be fully qualified, that
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# is, they must contain both a local part and a domain. Configure exim
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# to accept unqualified addresses from certain hosts. When this is done,
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# unqualified addresses are qualified using the settings of qualify_domain
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# and/or qualify_recipient (see above).
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# sender_unqualified_hosts = <unset>
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# recipient_unqualified_hosts = <unset>
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# Configure Exim to support the "percent hack" for certain domains.
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# The "percent hack" is the feature by which mail addressed to x%y@z
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# (where z is one of the domains listed) is locally rerouted to x@y
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# and sent on. If z is not one of the "percent hack" domains, x%y is
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# treated as an ordinary local part. The percent hack is rarely needed
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# nowadays but frequently abused. You should not enable it unless you
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# are sure that you really need it.
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# percent_hack_domains = <unset>
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# Bounce handling
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.ifndef MAIN_IGNORE_BOUNCE_ERRORS_AFTER
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MAIN_IGNORE_BOUNCE_ERRORS_AFTER = 2d
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.endif
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ignore_bounce_errors_after = MAIN_IGNORE_BOUNCE_ERRORS_AFTER
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.ifndef MAIN_TIMEOUT_FROZEN_AFTER
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MAIN_TIMEOUT_FROZEN_AFTER = 7d
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.endif
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timeout_frozen_after = MAIN_TIMEOUT_FROZEN_AFTER
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.ifndef MAIN_FREEZE_TELL
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MAIN_FREEZE_TELL = postmaster
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.endif
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freeze_tell = MAIN_FREEZE_TELL
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# Define spool directory
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.ifndef SPOOLDIR
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SPOOLDIR = /var/spool/exim4
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.endif
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spool_directory = SPOOLDIR
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# trusted users can set envelope-from to arbitrary values
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.ifndef MAIN_TRUSTED_USERS
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MAIN_TRUSTED_USERS = uucp
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.endif
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trusted_users = MAIN_TRUSTED_USERS
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.ifdef MAIN_TRUSTED_GROUPS
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trusted_groups = MAIN_TRUSTED_GROUPS
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.endif
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# users in admin group can do many other things
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# admin_groups = <unset>
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# SMTP Banner. The example includes the Debian version in the SMTP dialog
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# MAIN_SMTP_BANNER = "${primary_hostname} ESMTP Exim ${version_number} (Debian package MAIN_PACKAGE_VERSION) ${tod_full}"
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# smtp_banner = $smtp_active_hostname ESMTP Exim $version_number $tod_full
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.ifdef MAIN_KEEP_ENVIRONMENT
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keep_environment = MAIN_KEEP_ENVIRONMENT
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.else
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# set option to empty value to avoid warning.
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keep_environment =
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.endif
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.ifdef MAIN_ADD_ENVIRONMENT
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add_environment = MAIN_ADD_ENVIRONMENT
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.endif
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#####################################################
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### end main/02_exim4-config_options
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#####################################################
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#####################################################
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### main/03_exim4-config_tlsoptions
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#####################################################
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### main/03_exim4-config_tlsoptions
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#################################
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# TLS/SSL configuration for exim as an SMTP server.
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# See /usr/share/doc/exim4-base/README.Debian.gz for explanations.
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.ifdef MAIN_TLS_ENABLE
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# Defines what hosts to 'advertise' STARTTLS functionality to. The
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# default, *, will advertise to all hosts that connect with EHLO.
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.ifndef MAIN_TLS_ADVERTISE_HOSTS
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MAIN_TLS_ADVERTISE_HOSTS = *
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.endif
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tls_advertise_hosts = MAIN_TLS_ADVERTISE_HOSTS
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# Full paths to Certificate and Private Key. The Private Key file
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# must be kept 'secret' and should be owned by root.Debian-exim mode
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# 640 (-rw-r-----). exim-gencert takes care of these prerequisites.
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# Normally, exim4 looks for certificate and key in different files:
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# MAIN_TLS_CERTIFICATE - path to certificate file,
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# CONFDIR/exim.crt if unset
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# MAIN_TLS_PRIVATEKEY - path to private key file
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# CONFDIR/exim.key if unset
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# You can also configure exim to look for certificate and key in the
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# same file, set MAIN_TLS_CERTKEY to that file to enable. This takes
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# precedence over all other settings regarding certificate and key file.
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.ifdef MAIN_TLS_CERTKEY
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tls_certificate = MAIN_TLS_CERTKEY
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.else
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.ifndef MAIN_TLS_CERTIFICATE
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MAIN_TLS_CERTIFICATE = CONFDIR/exim.crt
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.endif
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tls_certificate = MAIN_TLS_CERTIFICATE
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.ifndef MAIN_TLS_PRIVATEKEY
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MAIN_TLS_PRIVATEKEY = CONFDIR/exim.key
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.endif
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tls_privatekey = MAIN_TLS_PRIVATEKEY
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.endif
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# Pointer to the CA Certificates against which client certificates are
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# checked. This is controlled by the `tls_verify_hosts' and
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# `tls_try_verify_hosts' lists below.
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# If you want to check server certificates, you need to add an
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# tls_verify_certificates statement to the smtp transport.
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# /etc/ssl/certs/ca-certificates.crt is generated by
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# the "ca-certificates" package's update-ca-certificates(8) command.
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.ifndef MAIN_TLS_VERIFY_CERTIFICATES
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MAIN_TLS_VERIFY_CERTIFICATES = ${if exists{/etc/ssl/certs/ca-certificates.crt}\
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{/etc/ssl/certs/ca-certificates.crt}\
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{/dev/null}}
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.endif
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tls_verify_certificates = MAIN_TLS_VERIFY_CERTIFICATES
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# A list of hosts which are constrained by `tls_verify_certificates'. A host
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# that matches `tls_verify_host' must present a certificate that is
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# verifyable through `tls_verify_certificates' in order to be accepted as an
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# SMTP client. If it does not, the connection is aborted.
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.ifdef MAIN_TLS_VERIFY_HOSTS
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tls_verify_hosts = MAIN_TLS_VERIFY_HOSTS
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.endif
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# A weaker form of checking: if a client matches `tls_try_verify_hosts' (but
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# not `tls_verify_hosts'), request a certificate and check it against
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# `tls_verify_certificates' but do not abort the connection if there is no
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# certificate or if the certificate presented does not match. (This
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# condition can be tested for in ACLs through `verify = certificate')
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# By default, this check is done for all hosts. It is known that some
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# clients (including incredimail's version downloadable in February
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# 2008) choke on this. To disable, set MAIN_TLS_TRY_VERIFY_HOSTS to an
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# empty value.
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.ifdef MAIN_TLS_TRY_VERIFY_HOSTS
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tls_try_verify_hosts = MAIN_TLS_TRY_VERIFY_HOSTS
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.endif
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.ifdef _HAVE_GNUTLS
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tls_dhparam = historic
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.endif
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.else
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# Don't advertise TLS if MAIN_TLS_ENABLE is not set.
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tls_advertise_hosts =
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.endif
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#####################################################
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### end main/03_exim4-config_tlsoptions
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#####################################################
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#####################################################
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### main/90_exim4-config_log_selector
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#####################################################
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### main/90_exim4-config_log_selector
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#################################
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# uncomment this for debugging
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# MAIN_LOG_SELECTOR == MAIN_LOG_SELECTOR +all -subject -arguments
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.ifdef MAIN_LOG_SELECTOR
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log_selector = MAIN_LOG_SELECTOR
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.endif
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#####################################################
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### end main/90_exim4-config_log_selector
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#####################################################
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#####################################################
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### acl/00_exim4-config_header
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#####################################################
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######################################################################
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# ACL CONFIGURATION #
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# Specifies access control lists for incoming SMTP mail #
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######################################################################
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begin acl
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#####################################################
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### end acl/00_exim4-config_header
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#####################################################
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#####################################################
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### acl/20_exim4-config_local_deny_exceptions
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#####################################################
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### acl/20_exim4-config_local_deny_exceptions
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#################################
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# This is used to determine whitelisted senders and hosts.
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# It checks for CONFDIR/host_local_deny_exceptions and
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# CONFDIR/sender_local_deny_exceptions.
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#
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# It is meant to be used from some other acl entry.
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#
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# See exim4-config_files(5) for details.
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#
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|
# If the files do not exist, the white list never matches, which is
|
|
# the desired behaviour.
|
|
#
|
|
# The old file names CONFDIR/local_host_whitelist and
|
|
# CONFDIR/local_sender_whitelist will continue to be honored for a
|
|
# transition period. Their use is deprecated.
|
|
|
|
acl_local_deny_exceptions:
|
|
accept
|
|
hosts = ${if exists{CONFDIR/host_local_deny_exceptions}\
|
|
{CONFDIR/host_local_deny_exceptions}\
|
|
{}}
|
|
accept
|
|
senders = ${if exists{CONFDIR/sender_local_deny_exceptions}\
|
|
{CONFDIR/sender_local_deny_exceptions}\
|
|
{}}
|
|
accept
|
|
hosts = ${if exists{CONFDIR/local_host_whitelist}\
|
|
{CONFDIR/local_host_whitelist}\
|
|
{}}
|
|
accept
|
|
senders = ${if exists{CONFDIR/local_sender_whitelist}\
|
|
{CONFDIR/local_sender_whitelist}\
|
|
{}}
|
|
|
|
# This hook allows you to hook in your own ACLs without having to
|
|
# modify this file. If you do it like we suggest, you'll end up with
|
|
# a small performance penalty since there is an additional file being
|
|
# accessed. This doesn't happen if you leave the macro unset.
|
|
.ifdef LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE
|
|
.include LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE
|
|
.endif
|
|
|
|
# this is still supported for a transition period and is deprecated.
|
|
.ifdef WHITELIST_LOCAL_DENY_LOCAL_ACL_FILE
|
|
.include WHITELIST_LOCAL_DENY_LOCAL_ACL_FILE
|
|
.endif
|
|
#####################################################
|
|
### end acl/20_exim4-config_local_deny_exceptions
|
|
#####################################################
|
|
#####################################################
|
|
### acl/30_exim4-config_check_mail
|
|
#####################################################
|
|
|
|
### acl/30_exim4-config_check_mail
|
|
#################################
|
|
|
|
# This access control list is used for every MAIL command in an incoming
|
|
# SMTP message. The tests are run in order until the address is either
|
|
# accepted or denied.
|
|
#
|
|
acl_check_mail:
|
|
|
|
accept
|
|
#####################################################
|
|
### end acl/30_exim4-config_check_mail
|
|
#####################################################
|
|
#####################################################
|
|
### acl/30_exim4-config_check_rcpt
|
|
#####################################################
|
|
|
|
### acl/30_exim4-config_check_rcpt
|
|
#################################
|
|
|
|
# This access control list is used for every RCPT command in an incoming
|
|
# SMTP message. The tests are run in order until the address is either
|
|
# accepted or denied.
|
|
#
|
|
acl_check_rcpt:
|
|
|
|
# Accept if the source is local SMTP (i.e. not over TCP/IP). We do this by
|
|
# testing for an empty sending host field.
|
|
accept
|
|
hosts = :
|
|
control = dkim_disable_verify
|
|
|
|
# Do not try to verify DKIM signatures of incoming mail if DC_minimaldns
|
|
# or DISABLE_DKIM_VERIFY are set.
|
|
.ifdef DC_minimaldns
|
|
warn
|
|
control = dkim_disable_verify
|
|
.else
|
|
.ifdef DISABLE_DKIM_VERIFY
|
|
warn
|
|
control = dkim_disable_verify
|
|
.endif
|
|
.endif
|
|
|
|
# The following section of the ACL is concerned with local parts that contain
|
|
# certain non-alphanumeric characters. Dots in unusual places are
|
|
# handled by this ACL as well.
|
|
#
|
|
# Non-alphanumeric characters other than dots are rarely found in genuine
|
|
# local parts, but are often tried by people looking to circumvent
|
|
# relaying restrictions. Therefore, although they are valid in local
|
|
# parts, these rules disallow certain non-alphanumeric characters, as
|
|
# a precaution.
|
|
#
|
|
# Empty components (two dots in a row) are not valid in RFC 2822, but Exim
|
|
# allows them because they have been encountered. (Consider local parts
|
|
# constructed as "firstinitial.secondinitial.familyname" when applied to
|
|
# a name without a second initial.) However, a local part starting
|
|
# with a dot or containing /../ can cause trouble if it is used as part of a
|
|
# file name (e.g. for a mailing list). This is also true for local parts that
|
|
# contain slashes. A pipe symbol can also be troublesome if the local part is
|
|
# incorporated unthinkingly into a shell command line.
|
|
#
|
|
# These ACL components will block recipient addresses that are valid
|
|
# from an RFC2822 point of view. We chose to have them blocked by
|
|
# default for security reasons.
|
|
#
|
|
# If you feel that your site should have less strict recipient
|
|
# checking, please feel free to change the default values of the macros
|
|
# defined in main/01_exim4-config_listmacrosdefs or override them from a
|
|
# local configuration file.
|
|
#
|
|
# Two different rules are used. The first one has a quite strict
|
|
# default, and is applied to messages that are addressed to one of the
|
|
# local domains handled by this host.
|
|
|
|
# The default value of CHECK_RCPT_LOCAL_LOCALPARTS is defined in
|
|
# main/01_exim4-config_listmacrosdefs:
|
|
# CHECK_RCPT_LOCAL_LOCALPARTS = ^[.] : ^.*[@%!/|`#&?]
|
|
# This blocks local parts that begin with a dot or contain a quite
|
|
# broad range of non-alphanumeric characters.
|
|
.ifdef CHECK_RCPT_LOCAL_LOCALPARTS
|
|
deny
|
|
domains = +local_domains
|
|
local_parts = CHECK_RCPT_LOCAL_LOCALPARTS
|
|
message = restricted characters in address
|
|
.endif
|
|
|
|
|
|
# The second rule applies to all other domains, and its default is
|
|
# considerably less strict.
|
|
|
|
# The default value of CHECK_RCPT_REMOTE_LOCALPARTS is defined in
|
|
# main/01_exim4-config_listmacrosdefs:
|
|
# CHECK_RCPT_REMOTE_LOCALPARTS = ^[./|] : ^.*[@%!`#&?] : ^.*/\\.\\./
|
|
|
|
# It allows local users to send outgoing messages to sites
|
|
# that use slashes and vertical bars in their local parts. It blocks
|
|
# local parts that begin with a dot, slash, or vertical bar, but allows
|
|
# these characters within the local part. However, the sequence /../ is
|
|
# barred. The use of some other non-alphanumeric characters is blocked.
|
|
# Single quotes might probably be dangerous as well, but they're
|
|
# allowed by the default regexps to avoid rejecting mails to Ireland.
|
|
# The motivation here is to prevent local users (or local users' malware)
|
|
# from mounting certain kinds of attack on remote sites.
|
|
.ifdef CHECK_RCPT_REMOTE_LOCALPARTS
|
|
deny
|
|
domains = !+local_domains
|
|
local_parts = CHECK_RCPT_REMOTE_LOCALPARTS
|
|
message = restricted characters in address
|
|
.endif
|
|
|
|
|
|
# Accept mail to postmaster in any local domain, regardless of the source,
|
|
# and without verifying the sender.
|
|
#
|
|
accept
|
|
.ifndef CHECK_RCPT_POSTMASTER
|
|
local_parts = postmaster
|
|
.else
|
|
local_parts = CHECK_RCPT_POSTMASTER
|
|
.endif
|
|
domains = +local_domains : +relay_to_domains
|
|
|
|
|
|
# Deny unless the sender address can be verified.
|
|
#
|
|
# This is disabled by default so that DNSless systems don't break. If
|
|
# your system can do DNS lookups without delay or cost, you might want
|
|
# to enable this feature.
|
|
#
|
|
# This feature does not work in smarthost and satellite setups as
|
|
# with these setups all domains pass verification. See spec.txt section
|
|
# "Access control lists" subsection "Address verification" with the added
|
|
# information that a smarthost/satellite setup routes all non-local e-mail
|
|
# to the smarthost.
|
|
.ifdef CHECK_RCPT_VERIFY_SENDER
|
|
deny
|
|
message = Sender verification failed
|
|
!acl = acl_local_deny_exceptions
|
|
!verify = sender
|
|
.endif
|
|
|
|
# Verify senders listed in local_sender_callout with a callout.
|
|
#
|
|
# In smarthost and satellite setups, this causes the callout to be
|
|
# done to the smarthost. Verification will thus only be reliable if the
|
|
# smarthost does reject illegal addresses in the SMTP dialog.
|
|
deny
|
|
!acl = acl_local_deny_exceptions
|
|
senders = ${if exists{CONFDIR/local_sender_callout}\
|
|
{CONFDIR/local_sender_callout}\
|
|
{}}
|
|
!verify = sender/callout
|
|
|
|
|
|
# Accept if the message comes from one of the hosts for which we are an
|
|
# outgoing relay. It is assumed that such hosts are most likely to be MUAs,
|
|
# so we set control=submission to make Exim treat the message as a
|
|
# submission. It will fix up various errors in the message, for example, the
|
|
# lack of a Date: header line. If you are actually relaying out out from
|
|
# MTAs, you may want to disable this. If you are handling both relaying from
|
|
# MTAs and submissions from MUAs you should probably split them into two
|
|
# lists, and handle them differently.
|
|
|
|
# Recipient verification is omitted here, because in many cases the clients
|
|
# are dumb MUAs that don't cope well with SMTP error responses. If you are
|
|
# actually relaying out from MTAs, you should probably add recipient
|
|
# verification here.
|
|
|
|
# Note that, by putting this test before any DNS black list checks, you will
|
|
# always accept from these hosts, even if they end up on a black list. The
|
|
# assumption is that they are your friends, and if they get onto black
|
|
# list, it is a mistake.
|
|
accept
|
|
hosts = +relay_from_hosts
|
|
control = submission/sender_retain
|
|
control = dkim_disable_verify
|
|
|
|
|
|
# Accept if the message arrived over an authenticated connection, from
|
|
# any host. Again, these messages are usually from MUAs, so recipient
|
|
# verification is omitted, and submission mode is set. And again, we do this
|
|
# check before any black list tests.
|
|
accept
|
|
authenticated = *
|
|
control = submission/sender_retain
|
|
control = dkim_disable_verify
|
|
|
|
# Insist that a HELO/EHLO was accepted.
|
|
|
|
require message = nice hosts say HELO first
|
|
condition = ${if def:sender_helo_name}
|
|
|
|
# Insist that any other recipient address that we accept is either in one of
|
|
# our local domains, or is in a domain for which we explicitly allow
|
|
# relaying. Any other domain is rejected as being unacceptable for relaying.
|
|
require
|
|
message = relay not permitted
|
|
domains = +local_domains : +relay_to_domains
|
|
|
|
|
|
# We also require all accepted addresses to be verifiable. This check will
|
|
# do local part verification for local domains, but only check the domain
|
|
# for remote domains.
|
|
require
|
|
verify = recipient
|
|
|
|
|
|
# Verify recipients listed in local_rcpt_callout with a callout.
|
|
# This is especially handy for forwarding MX hosts (secondary MX or
|
|
# mail hubs) of domains that receive a lot of spam to non-existent
|
|
# addresses. The only way to check local parts for remote relay
|
|
# domains is to use a callout (add /callout), but please read the
|
|
# documentation about callouts before doing this.
|
|
deny
|
|
!acl = acl_local_deny_exceptions
|
|
recipients = ${if exists{CONFDIR/local_rcpt_callout}\
|
|
{CONFDIR/local_rcpt_callout}\
|
|
{}}
|
|
!verify = recipient/callout
|
|
|
|
|
|
# CONFDIR/local_sender_blacklist holds a list of envelope senders that
|
|
# should have their access denied to the local host. Incoming messages
|
|
# with one of these senders are rejected at RCPT time.
|
|
#
|
|
# The explicit white lists are honored as well as negative items in
|
|
# the black list. See exim4-config_files(5) for details.
|
|
deny
|
|
message = sender envelope address $sender_address is locally blacklisted here. If you think this is wrong, get in touch with postmaster
|
|
!acl = acl_local_deny_exceptions
|
|
senders = ${if exists{CONFDIR/local_sender_blacklist}\
|
|
{CONFDIR/local_sender_blacklist}\
|
|
{}}
|
|
|
|
|
|
# deny bad sites (IP address)
|
|
# CONFDIR/local_host_blacklist holds a list of host names, IP addresses
|
|
# and networks (CIDR notation) that should have their access denied to
|
|
# The local host. Messages coming in from a listed host will have all
|
|
# RCPT statements rejected.
|
|
#
|
|
# The explicit white lists are honored as well as negative items in
|
|
# the black list. See exim4-config_files(5) for details.
|
|
deny
|
|
message = sender IP address $sender_host_address is locally blacklisted here. If you think this is wrong, get in touch with postmaster
|
|
!acl = acl_local_deny_exceptions
|
|
hosts = ${if exists{CONFDIR/local_host_blacklist}\
|
|
{CONFDIR/local_host_blacklist}\
|
|
{}}
|
|
|
|
|
|
# Warn if the sender host does not have valid reverse DNS.
|
|
#
|
|
# If your system can do DNS lookups without delay or cost, you might want
|
|
# to enable this.
|
|
# If sender_host_address is defined, it's a remote call. If
|
|
# sender_host_name is not defined, then reverse lookup failed. Use
|
|
# this instead of !verify = reverse_host_lookup to catch deferrals
|
|
# as well as outright failures.
|
|
.ifdef CHECK_RCPT_REVERSE_DNS
|
|
warn
|
|
condition = ${if and{{def:sender_host_address}{!def:sender_host_name}}\
|
|
{yes}{no}}
|
|
add_header = X-Host-Lookup-Failed: Reverse DNS lookup failed for $sender_host_address (${if eq{$host_lookup_failed}{1}{failed}{deferred}})
|
|
.endif
|
|
|
|
|
|
# Use spfquery to perform a pair of SPF checks (for details, see
|
|
# http://www.openspf.org/)
|
|
#
|
|
# This is quite costly in terms of DNS lookups (~6 lookups per mail). Do not
|
|
# enable if that's an issue. Also note that if you enable this, you must
|
|
# install "spf-tools-perl" which provides the spfquery command.
|
|
# Missing spf-tools-perl will trigger the "Unexpected error in
|
|
# SPF check" warning.
|
|
.ifdef CHECK_RCPT_SPF
|
|
deny
|
|
message = [SPF] $sender_host_address is not allowed to send mail from \
|
|
${if def:sender_address_domain {$sender_address_domain}{$sender_helo_name}}. \
|
|
Please see \
|
|
http://www.openspf.org/Why?scope=${if def:sender_address_domain \
|
|
{mfrom}{helo}};identity=${if def:sender_address_domain \
|
|
{$sender_address}{$sender_helo_name}};ip=$sender_host_address
|
|
log_message = SPF check failed.
|
|
!acl = acl_local_deny_exceptions
|
|
condition = ${run{/usr/bin/spfquery.mail-spf-perl --ip \
|
|
${quote:$sender_host_address} --identity \
|
|
${if def:sender_address_domain \
|
|
{--scope mfrom --identity ${quote:$sender_address}}\
|
|
{--scope helo --identity ${quote:$sender_helo_name}}}}\
|
|
{no}{${if eq {$runrc}{1}{yes}{no}}}}
|
|
|
|
defer
|
|
message = Temporary DNS error while checking SPF record. Try again later.
|
|
!acl = acl_local_deny_exceptions
|
|
condition = ${if eq {$runrc}{5}{yes}{no}}
|
|
|
|
warn
|
|
condition = ${if <={$runrc}{6}{yes}{no}}
|
|
add_header = Received-SPF: ${if eq {$runrc}{0}{pass}\
|
|
{${if eq {$runrc}{2}{softfail}\
|
|
{${if eq {$runrc}{3}{neutral}\
|
|
{${if eq {$runrc}{4}{permerror}\
|
|
{${if eq {$runrc}{6}{none}{error}}}}}}}}}\
|
|
} client-ip=$sender_host_address; \
|
|
${if def:sender_address_domain \
|
|
{envelope-from=${sender_address}; }{}}\
|
|
helo=$sender_helo_name
|
|
|
|
warn
|
|
log_message = Unexpected error in SPF check.
|
|
condition = ${if >{$runrc}{6}{yes}{no}}
|
|
.endif
|
|
|
|
|
|
# Check against classic DNS "black" lists (DNSBLs) which list
|
|
# sender IP addresses
|
|
.ifdef CHECK_RCPT_IP_DNSBLS
|
|
warn
|
|
dnslists = CHECK_RCPT_IP_DNSBLS
|
|
add_header = X-Warning: $sender_host_address is listed at $dnslist_domain ($dnslist_value: $dnslist_text)
|
|
log_message = $sender_host_address is listed at $dnslist_domain ($dnslist_value: $dnslist_text)
|
|
.endif
|
|
|
|
|
|
# Check against DNSBLs which list sender domains, with an option to locally
|
|
# whitelist certain domains that might be blacklisted.
|
|
#
|
|
# Note: If you define CHECK_RCPT_DOMAIN_DNSBLS, you must append
|
|
# "/$sender_address_domain" after each domain. For example:
|
|
# CHECK_RCPT_DOMAIN_DNSBLS = rhsbl.foo.org/$sender_address_domain \
|
|
# : rhsbl.bar.org/$sender_address_domain
|
|
.ifdef CHECK_RCPT_DOMAIN_DNSBLS
|
|
warn
|
|
!senders = ${if exists{CONFDIR/local_domain_dnsbl_whitelist}\
|
|
{CONFDIR/local_domain_dnsbl_whitelist}\
|
|
{}}
|
|
dnslists = CHECK_RCPT_DOMAIN_DNSBLS
|
|
add_header = X-Warning: $sender_address_domain is listed at $dnslist_domain ($dnslist_value: $dnslist_text)
|
|
log_message = $sender_address_domain is listed at $dnslist_domain ($dnslist_value: $dnslist_text)
|
|
.endif
|
|
|
|
|
|
# This hook allows you to hook in your own ACLs without having to
|
|
# modify this file. If you do it like we suggest, you'll end up with
|
|
# a small performance penalty since there is an additional file being
|
|
# accessed. This doesn't happen if you leave the macro unset.
|
|
.ifdef CHECK_RCPT_LOCAL_ACL_FILE
|
|
.include CHECK_RCPT_LOCAL_ACL_FILE
|
|
.endif
|
|
|
|
|
|
#############################################################################
|
|
# This check is commented out because it is recognized that not every
|
|
# sysadmin will want to do it. If you enable it, the check performs
|
|
# Client SMTP Authorization (csa) checks on the sending host. These checks
|
|
# do DNS lookups for SRV records. The CSA proposal is currently (May 2005)
|
|
# an Internet draft. You can, of course, add additional conditions to this
|
|
# ACL statement to restrict the CSA checks to certain hosts only.
|
|
#
|
|
# require verify = csa
|
|
#############################################################################
|
|
|
|
|
|
# Accept if the address is in a domain for which we are an incoming relay,
|
|
# but again, only if the recipient can be verified.
|
|
|
|
accept
|
|
domains = +relay_to_domains
|
|
endpass
|
|
verify = recipient
|
|
|
|
|
|
# At this point, the address has passed all the checks that have been
|
|
# configured, so we accept it unconditionally.
|
|
|
|
accept
|
|
#####################################################
|
|
### end acl/30_exim4-config_check_rcpt
|
|
#####################################################
|
|
#####################################################
|
|
### acl/40_exim4-config_check_data
|
|
#####################################################
|
|
|
|
### acl/40_exim4-config_check_data
|
|
#################################
|
|
|
|
# This ACL is used after the contents of a message have been received. This
|
|
# is the ACL in which you can test a message's headers or body, and in
|
|
# particular, this is where you can invoke external virus or spam scanners.
|
|
|
|
acl_check_data:
|
|
|
|
# Deny if the message contains an overlong line. Per the standards
|
|
# we should never receive one such via SMTP.
|
|
#
|
|
.ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
|
|
deny message = maximum allowed line length is 998 octets, \
|
|
got $max_received_linelength
|
|
condition = ${if > {$max_received_linelength}{998}}
|
|
.endif
|
|
|
|
# Deny unless the address list headers are syntactically correct.
|
|
#
|
|
# If you enable this, you might reject legitimate mail.
|
|
.ifdef CHECK_DATA_VERIFY_HEADER_SYNTAX
|
|
deny
|
|
message = Message headers fail syntax check
|
|
!acl = acl_local_deny_exceptions
|
|
!verify = header_syntax
|
|
.endif
|
|
|
|
|
|
# require that there is a verifiable sender address in at least
|
|
# one of the "Sender:", "Reply-To:", or "From:" header lines.
|
|
.ifdef CHECK_DATA_VERIFY_HEADER_SENDER
|
|
deny
|
|
message = No verifiable sender address in message headers
|
|
!acl = acl_local_deny_exceptions
|
|
!verify = header_sender
|
|
.endif
|
|
|
|
|
|
# Deny if the message contains malware. Before enabling this check, you
|
|
# must install a virus scanner and set the av_scanner option in the
|
|
# main configuration.
|
|
#
|
|
# exim4-daemon-heavy must be used for this section to work.
|
|
#
|
|
# deny
|
|
# malware = *
|
|
# message = This message was detected as possible malware ($malware_name).
|
|
|
|
|
|
# Add headers to a message if it is judged to be spam. Before enabling this,
|
|
# you must install SpamAssassin. You also need to set the spamd_address
|
|
# option in the main configuration.
|
|
#
|
|
# exim4-daemon-heavy must be used for this section to work.
|
|
#
|
|
# Please note that this is only suiteable as an example. There are
|
|
# multiple issues with this configuration method. For example, if you go
|
|
# this way, you'll give your spamassassin daemon write access to the
|
|
# entire exim spool which might be a security issue in case of a
|
|
# spamassassin exploit.
|
|
#
|
|
# See the exim docs and the exim wiki for more suitable examples.
|
|
#
|
|
# warn
|
|
# spam = Debian-exim:true
|
|
# add_header = X-Spam_score: $spam_score\n\
|
|
# X-Spam_score_int: $spam_score_int\n\
|
|
# X-Spam_bar: $spam_bar\n\
|
|
# X-Spam_report: $spam_report
|
|
|
|
|
|
# This hook allows you to hook in your own ACLs without having to
|
|
# modify this file. If you do it like we suggest, you'll end up with
|
|
# a small performance penalty since there is an additional file being
|
|
# accessed. This doesn't happen if you leave the macro unset.
|
|
.ifdef CHECK_DATA_LOCAL_ACL_FILE
|
|
.include CHECK_DATA_LOCAL_ACL_FILE
|
|
.endif
|
|
|
|
|
|
# accept otherwise
|
|
accept
|
|
#####################################################
|
|
### end acl/40_exim4-config_check_data
|
|
#####################################################
|
|
#####################################################
|
|
### router/00_exim4-config_header
|
|
#####################################################
|
|
|
|
######################################################################
|
|
# ROUTERS CONFIGURATION #
|
|
# Specifies how addresses are handled #
|
|
######################################################################
|
|
# THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT! #
|
|
# An address is passed to each router in turn until it is accepted. #
|
|
######################################################################
|
|
|
|
begin routers
|
|
|
|
#####################################################
|
|
### end router/00_exim4-config_header
|
|
#####################################################
|
|
#####################################################
|
|
### router/100_exim4-config_domain_literal
|
|
#####################################################
|
|
|
|
### router/100_exim4-config_domain_literal
|
|
#################################
|
|
|
|
# This router handles e-mail addresses in "domain literal" form like
|
|
# <user@[10.11.12.13]>. The RFCs require this facility, but it is disabled
|
|
# in the default config since it is rarely used and frequently abused.
|
|
# Domain literal support also needs to be enabled in the main config,
|
|
# which is automatically done if you use the enable macro
|
|
# MAIN_ALLOW_DOMAIN_LITERALS.
|
|
|
|
.ifdef MAIN_ALLOW_DOMAIN_LITERALS
|
|
domain_literal:
|
|
debug_print = "R: domain_literal for $local_part@$domain"
|
|
driver = ipliteral
|
|
domains = ! +local_domains
|
|
transport = remote_smtp
|
|
.endif
|
|
#####################################################
|
|
### end router/100_exim4-config_domain_literal
|
|
#####################################################
|
|
#####################################################
|
|
### router/150_exim4-config_hubbed_hosts
|
|
#####################################################
|
|
|
|
# router/150_exim4-config_hubbed_hosts
|
|
#################################
|
|
|
|
# route specific domains manually.
|
|
#
|
|
# see exim4-config_files(5) and spec.txt chapter 20.3 through 20.7 for
|
|
# more detailed documentation.
|
|
|
|
hubbed_hosts:
|
|
debug_print = "R: hubbed_hosts for $domain"
|
|
driver = manualroute
|
|
domains = "${if exists{CONFDIR/hubbed_hosts}\
|
|
{partial-lsearch;CONFDIR/hubbed_hosts}\
|
|
fail}"
|
|
same_domain_copy_routing = yes
|
|
route_data = ${lookup{$domain}partial-lsearch{CONFDIR/hubbed_hosts}}
|
|
transport = remote_smtp
|
|
#####################################################
|
|
### end router/150_exim4-config_hubbed_hosts
|
|
#####################################################
|
|
#####################################################
|
|
### router/200_exim4-config_primary
|
|
#####################################################
|
|
|
|
### router/200_exim4-config_primary
|
|
#################################
|
|
# This file holds the primary router, responsible for nonlocal mails
|
|
|
|
.ifdef DCconfig_internet
|
|
# configtype=internet
|
|
#
|
|
# deliver mail to the recipient if recipient domain is a domain we
|
|
# relay for. We do not ignore any target hosts here since delivering to
|
|
# a site local or even a link local address might be wanted here, and if
|
|
# such an address has found its way into the MX record of such a domain,
|
|
# the local admin is probably in a place where that broken MX record
|
|
# could be fixed.
|
|
|
|
dnslookup_relay_to_domains:
|
|
debug_print = "R: dnslookup_relay_to_domains for $local_part@$domain"
|
|
driver = dnslookup
|
|
domains = ! +local_domains : +relay_to_domains
|
|
transport = remote_smtp
|
|
same_domain_copy_routing = yes
|
|
no_more
|
|
|
|
# deliver mail directly to the recipient. This router is only reached
|
|
# for domains that we do not relay for. Since we most probably can't
|
|
# have broken MX records pointing to site local or link local IP
|
|
# addresses fixed, we ignore target hosts pointing to these addresses.
|
|
|
|
dnslookup:
|
|
debug_print = "R: dnslookup for $local_part@$domain"
|
|
driver = dnslookup
|
|
domains = ! +local_domains
|
|
transport = remote_smtp
|
|
same_domain_copy_routing = yes
|
|
# ignore private rfc1918 and APIPA addresses
|
|
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 : 192.168.0.0/16 :\
|
|
172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16 :\
|
|
255.255.255.255
|
|
no_more
|
|
|
|
.endif
|
|
|
|
|
|
.ifdef DCconfig_local
|
|
# configtype=local
|
|
#
|
|
# Stand-alone system, so generate an error for mail to a non-local domain
|
|
nonlocal:
|
|
debug_print = "R: nonlocal for $local_part@$domain"
|
|
driver = redirect
|
|
domains = ! +local_domains
|
|
allow_fail
|
|
data = :fail: Mailing to remote domains not supported
|
|
no_more
|
|
|
|
.endif
|
|
|
|
|
|
.ifdef DCconfig_smarthost DCconfig_satellite
|
|
# configtype=smarthost or configtype=satellite
|
|
#
|
|
# Send all non-local mail to a single other machine (smarthost).
|
|
#
|
|
# This means _ALL_ non-local mail goes to the smarthost. This will most
|
|
# probably not do what you want for domains that are listed in
|
|
# relay_domains. The most typical use for relay_domains is to control
|
|
# relaying for incoming e-mail on secondary MX hosts. In that case,
|
|
# it doesn't make sense to send the mail to the smarthost since the
|
|
# smarthost will probably send the message right back here, causing a
|
|
# loop.
|
|
#
|
|
# If you want to use a smarthost while being secondary MX for some
|
|
# domains, you'll need to copy the dnslookup_relay_to_domains router
|
|
# here so that mail to relay_domains is handled separately.
|
|
|
|
smarthost:
|
|
debug_print = "R: smarthost for $local_part@$domain"
|
|
driver = manualroute
|
|
domains = ! +local_domains
|
|
transport = remote_smtp_smarthost
|
|
route_list = * DCsmarthost byname
|
|
host_find_failed = ignore
|
|
same_domain_copy_routing = yes
|
|
no_more
|
|
|
|
.endif
|
|
|
|
|
|
# The "no_more" above means that all later routers are for
|
|
# domains in the local_domains list, i.e. just like Exim 3 directors.
|
|
#####################################################
|
|
### end router/200_exim4-config_primary
|
|
#####################################################
|
|
#####################################################
|
|
### router/300_exim4-config_real_local
|
|
#####################################################
|
|
|
|
### router/300_exim4-config_real_local
|
|
#################################
|
|
|
|
# This router allows reaching a local user while avoiding local
|
|
# processing. This can be used to inform a user of a broken .forward
|
|
# file, for example. The userforward router does this.
|
|
|
|
COND_LOCAL_SUBMITTER = "\
|
|
${if match_ip{$sender_host_address}{:@[]}\
|
|
{1}{0}\
|
|
}"
|
|
|
|
real_local:
|
|
debug_print = "R: real_local for $local_part@$domain"
|
|
driver = accept
|
|
domains = +local_domains
|
|
condition = COND_LOCAL_SUBMITTER
|
|
local_part_prefix = real-
|
|
check_local_user
|
|
transport = LOCAL_DELIVERY
|
|
|
|
#####################################################
|
|
### end router/300_exim4-config_real_local
|
|
#####################################################
|
|
#####################################################
|
|
### router/400_exim4-config_system_aliases
|
|
#####################################################
|
|
|
|
### router/400_exim4-config_system_aliases
|
|
#################################
|
|
|
|
# This router handles aliasing using a traditional /etc/aliases file.
|
|
#
|
|
##### NB You must ensure that /etc/aliases exists. It used to be the case
|
|
##### NB that every Unix had that file, because it was the Sendmail default.
|
|
##### NB These days, there are systems that don't have it. Your aliases
|
|
##### NB file should at least contain an alias for "postmaster".
|
|
#
|
|
# This router handles the local part in a case-insensitive way which
|
|
# satisfies the RFCs requirement that postmaster be reachable regardless
|
|
# of case. If you decide to handle /etc/aliases in a caseful way, you
|
|
# need to make arrangements for a caseless postmaster.
|
|
#
|
|
# Delivery to arbitrary directories, files, and piping to programs in
|
|
# /etc/aliases is disabled per default.
|
|
# If that is a problem for you, see
|
|
# /usr/share/doc/exim4-base/README.Debian.gz
|
|
# for explanation and some workarounds.
|
|
|
|
system_aliases:
|
|
debug_print = "R: system_aliases for $local_part@$domain"
|
|
driver = redirect
|
|
domains = +local_domains
|
|
allow_fail
|
|
allow_defer
|
|
data = ${lookup{$local_part}lsearch{/etc/aliases}}
|
|
.ifdef SYSTEM_ALIASES_USER
|
|
user = SYSTEM_ALIASES_USER
|
|
.endif
|
|
.ifdef SYSTEM_ALIASES_GROUP
|
|
group = SYSTEM_ALIASES_GROUP
|
|
.endif
|
|
.ifdef SYSTEM_ALIASES_FILE_TRANSPORT
|
|
file_transport = SYSTEM_ALIASES_FILE_TRANSPORT
|
|
.endif
|
|
.ifdef SYSTEM_ALIASES_PIPE_TRANSPORT
|
|
pipe_transport = SYSTEM_ALIASES_PIPE_TRANSPORT
|
|
.endif
|
|
.ifdef SYSTEM_ALIASES_DIRECTORY_TRANSPORT
|
|
directory_transport = SYSTEM_ALIASES_DIRECTORY_TRANSPORT
|
|
.endif
|
|
#####################################################
|
|
### end router/400_exim4-config_system_aliases
|
|
#####################################################
|
|
#####################################################
|
|
### router/500_exim4-config_hubuser
|
|
#####################################################
|
|
|
|
### router/500_exim4-config_hubuser
|
|
#################################
|
|
|
|
.ifdef DCconfig_satellite
|
|
# This router is only used for configtype=satellite.
|
|
# It takes care to route all mail targeted to <somelocaluser@this.machine>
|
|
# to the host where we read our mail
|
|
#
|
|
hub_user:
|
|
debug_print = "R: hub_user for $local_part@$domain"
|
|
driver = redirect
|
|
domains = +local_domains
|
|
data = ${local_part}@DCreadhost
|
|
check_local_user
|
|
|
|
# Grab the redirected mail and deliver it.
|
|
# This is a duplicate of the smarthost router, needed because
|
|
# DCreadhost might end up as part of +local_domains
|
|
hub_user_smarthost:
|
|
debug_print = "R: hub_user_smarthost for $local_part@$domain"
|
|
driver = manualroute
|
|
domains = DCreadhost
|
|
transport = remote_smtp_smarthost
|
|
route_list = * DCsmarthost byname
|
|
host_find_failed = ignore
|
|
same_domain_copy_routing = yes
|
|
check_local_user
|
|
.endif
|
|
|
|
|
|
#####################################################
|
|
### end router/500_exim4-config_hubuser
|
|
#####################################################
|
|
#####################################################
|
|
### router/600_exim4-config_userforward
|
|
#####################################################
|
|
|
|
### router/600_exim4-config_userforward
|
|
#################################
|
|
|
|
# This router handles forwarding using traditional .forward files in users'
|
|
# home directories. It also allows mail filtering with a forward file
|
|
# starting with the string "# Exim filter" or "# Sieve filter".
|
|
#
|
|
# The no_verify setting means that this router is skipped when Exim is
|
|
# verifying addresses. Similarly, no_expn means that this router is skipped if
|
|
# Exim is processing an EXPN command.
|
|
#
|
|
# The check_ancestor option means that if the forward file generates an
|
|
# address that is an ancestor of the current one, the current one gets
|
|
# passed on instead. This covers the case where A is aliased to B and B
|
|
# has a .forward file pointing to A.
|
|
#
|
|
# The four transports specified at the end are those that are used when
|
|
# forwarding generates a direct delivery to a directory, or a file, or to a
|
|
# pipe, or sets up an auto-reply, respectively.
|
|
#
|
|
userforward:
|
|
debug_print = "R: userforward for $local_part@$domain"
|
|
driver = redirect
|
|
domains = +local_domains
|
|
check_local_user
|
|
file = $home/.forward
|
|
require_files = $local_part:$home/.forward
|
|
no_verify
|
|
no_expn
|
|
check_ancestor
|
|
allow_filter
|
|
forbid_smtp_code = true
|
|
directory_transport = address_directory
|
|
file_transport = address_file
|
|
pipe_transport = address_pipe
|
|
reply_transport = address_reply
|
|
skip_syntax_errors
|
|
syntax_errors_to = real-$local_part@$domain
|
|
syntax_errors_text = \
|
|
This is an automatically generated message. An error has\n\
|
|
been found in your .forward file. Details of the error are\n\
|
|
reported below. While this error persists, you will receive\n\
|
|
a copy of this message for every message that is addressed\n\
|
|
to you. If your .forward file is a filter file, or if it is\n\
|
|
a non-filter file containing no valid forwarding addresses,\n\
|
|
a copy of each incoming message will be put in your normal\n\
|
|
mailbox. If a non-filter file contains at least one valid\n\
|
|
forwarding address, forwarding to the valid addresses will\n\
|
|
happen, and those will be the only deliveries that occur.
|
|
|
|
#####################################################
|
|
### end router/600_exim4-config_userforward
|
|
#####################################################
|
|
#####################################################
|
|
### router/700_exim4-config_procmail
|
|
#####################################################
|
|
|
|
procmail:
|
|
debug_print = "R: procmail for $local_part@$domain"
|
|
driver = accept
|
|
domains = +local_domains
|
|
check_local_user
|
|
transport = procmail_pipe
|
|
# emulate OR with "if exists"-expansion
|
|
require_files = ${local_part}:\
|
|
${if exists{/etc/procmailrc}\
|
|
{/etc/procmailrc}{${home}/.procmailrc}}:\
|
|
+/usr/bin/procmail
|
|
no_verify
|
|
no_expn
|
|
|
|
#####################################################
|
|
### end router/700_exim4-config_procmail
|
|
#####################################################
|
|
#####################################################
|
|
### router/800_exim4-config_maildrop
|
|
#####################################################
|
|
|
|
### router/800_exim4-config_maildrop
|
|
#################################
|
|
|
|
maildrop:
|
|
debug_print = "R: maildrop for $local_part@$domain"
|
|
driver = accept
|
|
domains = +local_domains
|
|
check_local_user
|
|
transport = maildrop_pipe
|
|
require_files = ${local_part}:${home}/.mailfilter:+/usr/bin/maildrop
|
|
no_verify
|
|
no_expn
|
|
|
|
#####################################################
|
|
### end router/800_exim4-config_maildrop
|
|
#####################################################
|
|
#####################################################
|
|
### router/850_exim4-config_lowuid
|
|
#####################################################
|
|
|
|
### router/850_exim4-config_lowuid
|
|
#################################
|
|
|
|
.ifndef FIRST_USER_ACCOUNT_UID
|
|
FIRST_USER_ACCOUNT_UID = 0
|
|
.endif
|
|
|
|
.ifndef DEFAULT_SYSTEM_ACCOUNT_ALIAS
|
|
DEFAULT_SYSTEM_ACCOUNT_ALIAS = :fail: no mail to system accounts
|
|
.endif
|
|
|
|
COND_SYSTEM_USER_AND_REMOTE_SUBMITTER = "\
|
|
${if and{{! match_ip{$sender_host_address}{:@[]}}\
|
|
{<{$local_user_uid}{FIRST_USER_ACCOUNT_UID}}}\
|
|
{1}{0}\
|
|
}"
|
|
|
|
lowuid_aliases:
|
|
debug_print = "R: lowuid_aliases for $local_part@$domain (UID $local_user_uid)"
|
|
check_local_user
|
|
driver = redirect
|
|
allow_fail
|
|
domains = +local_domains
|
|
condition = COND_SYSTEM_USER_AND_REMOTE_SUBMITTER
|
|
data = ${if exists{CONFDIR/lowuid-aliases}\
|
|
{${lookup{$local_part}lsearch{CONFDIR/lowuid-aliases}\
|
|
{$value}{DEFAULT_SYSTEM_ACCOUNT_ALIAS}}}\
|
|
{DEFAULT_SYSTEM_ACCOUNT_ALIAS}}
|
|
#####################################################
|
|
### end router/850_exim4-config_lowuid
|
|
#####################################################
|
|
#####################################################
|
|
### router/900_exim4-config_local_user
|
|
#####################################################
|
|
|
|
### router/900_exim4-config_local_user
|
|
#################################
|
|
|
|
# This router matches local user mailboxes. If the router fails, the error
|
|
# message is "Unknown user".
|
|
|
|
local_user:
|
|
debug_print = "R: local_user for $local_part@$domain"
|
|
driver = accept
|
|
domains = +local_domains
|
|
check_local_user
|
|
local_parts = ! root
|
|
transport = LOCAL_DELIVERY
|
|
cannot_route_message = Unknown user
|
|
#####################################################
|
|
### end router/900_exim4-config_local_user
|
|
#####################################################
|
|
#####################################################
|
|
### router/mmm_mail4root
|
|
#####################################################
|
|
|
|
### router/mmm_mail4root
|
|
#################################
|
|
# deliver mail addressed to root to /var/mail/mail as user mail:mail
|
|
# if it was not redirected in /etc/aliases or by other means
|
|
# Exim cannot deliver as root since 4.24 (FIXED_NEVER_USERS)
|
|
|
|
mail4root:
|
|
debug_print = "R: mail4root for $local_part@$domain"
|
|
driver = redirect
|
|
domains = +local_domains
|
|
data = /var/mail/mail
|
|
file_transport = address_file
|
|
local_parts = root
|
|
user = mail
|
|
group = mail
|
|
|
|
#####################################################
|
|
### end router/mmm_mail4root
|
|
#####################################################
|
|
#####################################################
|
|
### transport/00_exim4-config_header
|
|
#####################################################
|
|
|
|
######################################################################
|
|
# TRANSPORTS CONFIGURATION #
|
|
######################################################################
|
|
# ORDER DOES NOT MATTER #
|
|
# Only one appropriate transport is called for each delivery. #
|
|
######################################################################
|
|
|
|
# A transport is used only when referenced from a router that successfully
|
|
# handles an address.
|
|
|
|
begin transports
|
|
|
|
#####################################################
|
|
### end transport/00_exim4-config_header
|
|
#####################################################
|
|
#####################################################
|
|
### transport/10_exim4-config_transport-macros
|
|
#####################################################
|
|
|
|
### transport/10_exim4-config_transport-macros
|
|
#################################
|
|
|
|
.ifdef HIDE_MAILNAME
|
|
REMOTE_SMTP_HEADERS_REWRITE=*@+local_domains $1@DCreadhost frs : *@ETC_MAILNAME $1@DCreadhost frs
|
|
REMOTE_SMTP_RETURN_PATH=${if match_domain{$sender_address_domain}{+local_domains}{${sender_address_local_part}@DCreadhost}{${if match_domain{$sender_address_domain}{ETC_MAILNAME}{${sender_address_local_part}@DCreadhost}fail}}}
|
|
.endif
|
|
|
|
.ifdef REMOTE_SMTP_HELO_FROM_DNS
|
|
.ifdef REMOTE_SMTP_HELO_DATA
|
|
REMOTE_SMTP_HELO_DATA==${lookup dnsdb {ptr=$sending_ip_address}{$value}{$primary_hostname}}
|
|
.else
|
|
REMOTE_SMTP_HELO_DATA=${lookup dnsdb {ptr=$sending_ip_address}{$value}{$primary_hostname}}
|
|
.endif
|
|
.endif
|
|
#####################################################
|
|
### end transport/10_exim4-config_transport-macros
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_address_file
|
|
#####################################################
|
|
|
|
# This transport is used for handling deliveries directly to files that are
|
|
# generated by aliasing or forwarding.
|
|
#
|
|
address_file:
|
|
debug_print = "T: address_file for $local_part@$domain"
|
|
driver = appendfile
|
|
delivery_date_add
|
|
envelope_to_add
|
|
return_path_add
|
|
|
|
#####################################################
|
|
### end transport/30_exim4-config_address_file
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_address_pipe
|
|
#####################################################
|
|
|
|
# This transport is used for handling pipe deliveries generated by
|
|
# .forward files. If the commands fails and produces any output on standard
|
|
# output or standard error streams, the output is returned to the sender
|
|
# of the message as a delivery error.
|
|
address_pipe:
|
|
debug_print = "T: address_pipe for $local_part@$domain"
|
|
driver = pipe
|
|
return_fail_output
|
|
|
|
#####################################################
|
|
### end transport/30_exim4-config_address_pipe
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_address_reply
|
|
#####################################################
|
|
|
|
# This transport is used for handling autoreplies generated by the filtering
|
|
# option of the userforward router.
|
|
#
|
|
address_reply:
|
|
debug_print = "T: autoreply for $local_part@$domain"
|
|
driver = autoreply
|
|
|
|
#####################################################
|
|
### end transport/30_exim4-config_address_reply
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_mail_spool
|
|
#####################################################
|
|
|
|
### transport/30_exim4-config_mail_spool
|
|
|
|
# This transport is used for local delivery to user mailboxes in traditional
|
|
# BSD mailbox format.
|
|
#
|
|
mail_spool:
|
|
debug_print = "T: appendfile for $local_part@$domain"
|
|
driver = appendfile
|
|
file = /var/mail/$local_part
|
|
delivery_date_add
|
|
envelope_to_add
|
|
return_path_add
|
|
group = mail
|
|
mode = 0660
|
|
mode_fail_narrower = false
|
|
|
|
#####################################################
|
|
### end transport/30_exim4-config_mail_spool
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_maildir_home
|
|
#####################################################
|
|
|
|
### transport/30_exim4-config_maildir_home
|
|
#################################
|
|
|
|
# Use this instead of mail_spool if you want to to deliver to Maildir in
|
|
# home-directory - change the definition of LOCAL_DELIVERY
|
|
#
|
|
maildir_home:
|
|
debug_print = "T: maildir_home for $local_part@$domain"
|
|
driver = appendfile
|
|
.ifdef MAILDIR_HOME_MAILDIR_LOCATION
|
|
directory = MAILDIR_HOME_MAILDIR_LOCATION
|
|
.else
|
|
directory = $home/Maildir
|
|
.endif
|
|
.ifdef MAILDIR_HOME_CREATE_DIRECTORY
|
|
create_directory
|
|
.endif
|
|
.ifdef MAILDIR_HOME_CREATE_FILE
|
|
create_file = MAILDIR_HOME_CREATE_FILE
|
|
.endif
|
|
delivery_date_add
|
|
envelope_to_add
|
|
return_path_add
|
|
maildir_format
|
|
.ifdef MAILDIR_HOME_DIRECTORY_MODE
|
|
directory_mode = MAILDIR_HOME_DIRECTORY_MODE
|
|
.else
|
|
directory_mode = 0700
|
|
.endif
|
|
.ifdef MAILDIR_HOME_MODE
|
|
mode = MAILDIR_HOME_MODE
|
|
.else
|
|
mode = 0600
|
|
.endif
|
|
mode_fail_narrower = false
|
|
# This transport always chdirs to $home before trying to deliver. If
|
|
# $home is not accessible, this chdir fails and prevents delivery.
|
|
# If you are in a setup where home directories might not be
|
|
# accessible, uncomment the current_directory line below.
|
|
# current_directory = /
|
|
#####################################################
|
|
### end transport/30_exim4-config_maildir_home
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_maildrop_pipe
|
|
#####################################################
|
|
|
|
maildrop_pipe:
|
|
debug_print = "T: maildrop_pipe for $local_part@$domain"
|
|
driver = pipe
|
|
path = "/bin:/usr/bin:/usr/local/bin"
|
|
command = "/usr/bin/maildrop"
|
|
message_prefix =
|
|
message_suffix =
|
|
return_path_add
|
|
delivery_date_add
|
|
envelope_to_add
|
|
|
|
#####################################################
|
|
### end transport/30_exim4-config_maildrop_pipe
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_procmail_pipe
|
|
#####################################################
|
|
|
|
procmail_pipe:
|
|
debug_print = "T: procmail_pipe for $local_part@$domain"
|
|
driver = pipe
|
|
path = "/bin:/usr/bin:/usr/local/bin"
|
|
command = "/usr/bin/procmail"
|
|
return_path_add
|
|
delivery_date_add
|
|
envelope_to_add
|
|
|
|
#####################################################
|
|
### end transport/30_exim4-config_procmail_pipe
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_remote_smtp
|
|
#####################################################
|
|
|
|
### transport/30_exim4-config_remote_smtp
|
|
#################################
|
|
# This transport is used for delivering messages over SMTP connections.
|
|
# Refuse to send any message with over-long lines, which could have
|
|
# been received other than via SMTP. The use of message_size_limit to
|
|
# enforce this is a red herring.
|
|
|
|
remote_smtp:
|
|
debug_print = "T: remote_smtp for $local_part@$domain"
|
|
driver = smtp
|
|
.ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
|
|
message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
|
|
.endif
|
|
.ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
|
|
hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
|
|
.endif
|
|
.ifdef REMOTE_SMTP_HEADERS_REWRITE
|
|
headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
|
|
.endif
|
|
.ifdef REMOTE_SMTP_RETURN_PATH
|
|
return_path = REMOTE_SMTP_RETURN_PATH
|
|
.endif
|
|
.ifdef REMOTE_SMTP_HELO_DATA
|
|
helo_data=REMOTE_SMTP_HELO_DATA
|
|
.endif
|
|
.ifdef DKIM_DOMAIN
|
|
dkim_domain = DKIM_DOMAIN
|
|
.endif
|
|
.ifdef DKIM_SELECTOR
|
|
dkim_selector = DKIM_SELECTOR
|
|
.endif
|
|
.ifdef DKIM_PRIVATE_KEY
|
|
dkim_private_key = DKIM_PRIVATE_KEY
|
|
.endif
|
|
.ifdef DKIM_CANON
|
|
dkim_canon = DKIM_CANON
|
|
.endif
|
|
.ifdef DKIM_STRICT
|
|
dkim_strict = DKIM_STRICT
|
|
.endif
|
|
.ifdef DKIM_SIGN_HEADERS
|
|
dkim_sign_headers = DKIM_SIGN_HEADERS
|
|
.endif
|
|
.ifdef TLS_DH_MIN_BITS
|
|
tls_dh_min_bits = TLS_DH_MIN_BITS
|
|
.endif
|
|
.ifdef REMOTE_SMTP_TLS_CERTIFICATE
|
|
tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
|
|
.endif
|
|
.ifdef REMOTE_SMTP_PRIVATEKEY
|
|
tls_privatekey = REMOTE_SMTP_PRIVATEKEY
|
|
.endif
|
|
#####################################################
|
|
### end transport/30_exim4-config_remote_smtp
|
|
#####################################################
|
|
#####################################################
|
|
### transport/30_exim4-config_remote_smtp_smarthost
|
|
#####################################################
|
|
|
|
### transport/30_exim4-config_remote_smtp_smarthost
|
|
#################################
|
|
|
|
# This transport is used for delivering messages over SMTP connections
|
|
# to a smarthost. The local host tries to authenticate.
|
|
# This transport is used for smarthost and satellite configurations.
|
|
# Refuse to send any messsage with over-long lines, which could have
|
|
# been received other than via SMTP. The use of message_size_limit to
|
|
# enforce this is a red herring.
|
|
|
|
remote_smtp_smarthost:
|
|
debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
|
|
driver = smtp
|
|
.ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
|
|
message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
|
|
.endif
|
|
hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
|
|
{\
|
|
${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
|
|
}\
|
|
{} \
|
|
}
|
|
.ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
|
|
hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
|
|
.endif
|
|
.ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
|
|
hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
|
|
.endif
|
|
.ifdef REMOTE_SMTP_HEADERS_REWRITE
|
|
headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
|
|
.endif
|
|
.ifdef REMOTE_SMTP_RETURN_PATH
|
|
return_path = REMOTE_SMTP_RETURN_PATH
|
|
.endif
|
|
.ifdef REMOTE_SMTP_HELO_DATA
|
|
helo_data=REMOTE_SMTP_HELO_DATA
|
|
.endif
|
|
.ifdef TLS_DH_MIN_BITS
|
|
tls_dh_min_bits = TLS_DH_MIN_BITS
|
|
.endif
|
|
.ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
|
|
tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
|
|
.endif
|
|
.ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
|
|
tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
|
|
.endif
|
|
#####################################################
|
|
### end transport/30_exim4-config_remote_smtp_smarthost
|
|
#####################################################
|
|
#####################################################
|
|
### transport/35_exim4-config_address_directory
|
|
#####################################################
|
|
# This transport is used for handling file addresses generated by alias
|
|
# or .forward files if the path ends in "/", which causes it to be treated
|
|
# as a directory name rather than a file name.
|
|
|
|
address_directory:
|
|
debug_print = "T: address_directory for $local_part@$domain"
|
|
driver = appendfile
|
|
delivery_date_add
|
|
envelope_to_add
|
|
return_path_add
|
|
check_string = ""
|
|
escape_string = ""
|
|
maildir_format
|
|
|
|
#####################################################
|
|
### end transport/35_exim4-config_address_directory
|
|
#####################################################
|
|
#####################################################
|
|
### retry/00_exim4-config_header
|
|
#####################################################
|
|
|
|
######################################################################
|
|
# RETRY CONFIGURATION #
|
|
######################################################################
|
|
|
|
begin retry
|
|
|
|
#####################################################
|
|
### end retry/00_exim4-config_header
|
|
#####################################################
|
|
#####################################################
|
|
### retry/30_exim4-config
|
|
#####################################################
|
|
|
|
### retry/30_exim4-config
|
|
#################################
|
|
|
|
# This single retry rule applies to all domains and all errors. It specifies
|
|
# retries every 15 minutes for 2 hours, then increasing retry intervals,
|
|
# starting at 1 hour and increasing each time by a factor of 1.5, up to 16
|
|
# hours, then retries every 6 hours until 4 days have passed since the first
|
|
# failed delivery.
|
|
|
|
# Please note that these rules only limit the frequency of retries, the
|
|
# effective retry-time depends on the frequency of queue-running, too.
|
|
# See QUEUEINTERVAL in /etc/default/exim4.
|
|
|
|
# Address or Domain Error Retries
|
|
# ----------------- ----- -------
|
|
|
|
* * F,2h,15m; G,16h,1h,1.5; F,4d,6h
|
|
|
|
#####################################################
|
|
### end retry/30_exim4-config
|
|
#####################################################
|
|
#####################################################
|
|
### rewrite/00_exim4-config_header
|
|
#####################################################
|
|
|
|
######################################################################
|
|
# REWRITE CONFIGURATION #
|
|
######################################################################
|
|
|
|
begin rewrite
|
|
|
|
#####################################################
|
|
### end rewrite/00_exim4-config_header
|
|
#####################################################
|
|
#####################################################
|
|
### rewrite/31_exim4-config_rewriting
|
|
#####################################################
|
|
|
|
### rewrite/31_exim4-config_rewriting
|
|
#################################
|
|
|
|
# This rewriting rule is particularly useful for dialup users who
|
|
# don't have their own domain, but could be useful for anyone.
|
|
# It looks up the real address of all local users in a file
|
|
.ifndef NO_EAA_REWRITE_REWRITE
|
|
*@+local_domains "${lookup{${local_part}}lsearch{/etc/email-addresses}\
|
|
{$value}fail}" Ffrs
|
|
# identical rewriting rule for /etc/mailname
|
|
*@ETC_MAILNAME "${lookup{${local_part}}lsearch{/etc/email-addresses}\
|
|
{$value}fail}" Ffrs
|
|
.endif
|
|
|
|
|
|
#####################################################
|
|
### end rewrite/31_exim4-config_rewriting
|
|
#####################################################
|
|
#####################################################
|
|
### auth/00_exim4-config_header
|
|
#####################################################
|
|
|
|
######################################################################
|
|
# AUTHENTICATION CONFIGURATION #
|
|
######################################################################
|
|
|
|
begin authenticators
|
|
|
|
|
|
#####################################################
|
|
### end auth/00_exim4-config_header
|
|
#####################################################
|
|
#####################################################
|
|
### auth/30_exim4-config_examples
|
|
#####################################################
|
|
|
|
### auth/30_exim4-config_examples
|
|
#################################
|
|
|
|
# The examples below are for server side authentication, when the
|
|
# local exim is SMTP server and clients authenticate to the local exim.
|
|
|
|
# They allow two styles of plain-text authentication against an
|
|
# CONFDIR/passwd file whose syntax is described in exim4_passwd(5).
|
|
|
|
# Hosts that are allowed to use AUTH are defined by the
|
|
# auth_advertise_hosts option in the main configuration. The default is
|
|
# "*", which allows authentication to all hosts over all kinds of
|
|
# connections if there is at least one authenticator defined here.
|
|
# Authenticators which rely on unencrypted clear text passwords don't
|
|
# advertise on unencrypted connections by default. Thus, it might be
|
|
# wise to set up TLS to allow encrypted connections. If TLS cannot be
|
|
# used for some reason, you can set AUTH_SERVER_ALLOW_NOTLS_PASSWORDS to
|
|
# advertise unencrypted clear text password based authenticators on all
|
|
# connections. As this is severely reducing security, using TLS is
|
|
# preferred over allowing clear text password based authenticators on
|
|
# unencrypted connections.
|
|
|
|
# PLAIN authentication has no server prompts. The client sends its
|
|
# credentials in one lump, containing an authorization ID (which we do not
|
|
# use), an authentication ID, and a password. The latter two appear as
|
|
# $auth2 and $auth3 in the configuration and should be checked against a
|
|
# valid username and password. In a real configuration you would typically
|
|
# use $auth2 as a lookup key, and compare $auth3 against the result of the
|
|
# lookup, perhaps using the crypteq{}{} condition.
|
|
|
|
# plain_server:
|
|
# driver = plaintext
|
|
# public_name = PLAIN
|
|
# server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
|
|
# server_set_id = $auth2
|
|
# server_prompts = :
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
|
|
# LOGIN authentication has traditional prompts and responses. There is no
|
|
# authorization ID in this mechanism, so unlike PLAIN the username and
|
|
# password are $auth1 and $auth2. Apart from that you can use the same
|
|
# server_condition setting for both authenticators.
|
|
|
|
# login_server:
|
|
# driver = plaintext
|
|
# public_name = LOGIN
|
|
# server_prompts = "Username:: : Password::"
|
|
# server_condition = "${if crypteq{$auth2}{${extract{1}{:}{${lookup{$auth1}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
#
|
|
# cram_md5_server:
|
|
# driver = cram_md5
|
|
# public_name = CRAM-MD5
|
|
# server_secret = ${extract{2}{:}{${lookup{$auth1}lsearch{CONFDIR/passwd}{$value}fail}}}
|
|
# server_set_id = $auth1
|
|
|
|
# Here is an example of CRAM-MD5 authentication against PostgreSQL:
|
|
#
|
|
# psqldb_auth_server:
|
|
# driver = cram_md5
|
|
# public_name = CRAM-MD5
|
|
# server_secret = ${lookup pgsql{SELECT pw FROM users WHERE username = '${quote_pgsql:$auth1}'}{$value}fail}
|
|
# server_set_id = $auth1
|
|
|
|
# Authenticate against local passwords using sasl2-bin
|
|
# Requires exim_uid to be a member of sasl group, see README.Debian.gz
|
|
# plain_saslauthd_server:
|
|
# driver = plaintext
|
|
# public_name = PLAIN
|
|
# server_condition = ${if saslauthd{{$auth2}{$auth3}}{1}{0}}
|
|
# server_set_id = $auth2
|
|
# server_prompts = :
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
#
|
|
# login_saslauthd_server:
|
|
# driver = plaintext
|
|
# public_name = LOGIN
|
|
# server_prompts = "Username:: : Password::"
|
|
# # don't send system passwords over unencrypted connections
|
|
# server_condition = ${if saslauthd{{$auth1}{$auth2}}{1}{0}}
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
#
|
|
# ntlm_sasl_server:
|
|
# driver = cyrus_sasl
|
|
# public_name = NTLM
|
|
# server_realm = <short main hostname>
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
#
|
|
# digest_md5_sasl_server:
|
|
# driver = cyrus_sasl
|
|
# public_name = DIGEST-MD5
|
|
# server_realm = <short main hostname>
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
|
|
# Authentcate against cyrus-sasl
|
|
# This is mainly untested, please report any problems to
|
|
# pkg-exim4-users@lists.alioth.debian.org.
|
|
# cram_md5_sasl_server:
|
|
# driver = cyrus_sasl
|
|
# public_name = CRAM-MD5
|
|
# server_realm = <short main hostname>
|
|
# server_set_id = $auth1
|
|
#
|
|
# plain_sasl_server:
|
|
# driver = cyrus_sasl
|
|
# public_name = PLAIN
|
|
# server_realm = <short main hostname>
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
#
|
|
# login_sasl_server:
|
|
# driver = cyrus_sasl
|
|
# public_name = LOGIN
|
|
# server_realm = <short main hostname>
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
|
|
# Authenticate against courier authdaemon
|
|
|
|
# This is now the (working!) example from
|
|
# http://www.exim.org/eximwiki/FAQ/Policy_controls/Q0730
|
|
# Possible pitfall: access rights on /var/run/courier/authdaemon/socket.
|
|
# plain_courier_authdaemon:
|
|
# driver = plaintext
|
|
# public_name = PLAIN
|
|
# server_condition = \
|
|
# ${extract {ADDRESS} \
|
|
# {${readsocket{/var/run/courier/authdaemon/socket} \
|
|
# {AUTH ${strlen:exim\nlogin\n$auth2\n$auth3\n}\nexim\nlogin\n$auth2\n$auth3\n} }} \
|
|
# {yes} \
|
|
# fail}
|
|
# server_set_id = $auth2
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
|
|
# login_courier_authdaemon:
|
|
# driver = plaintext
|
|
# public_name = LOGIN
|
|
# server_prompts = Username:: : Password::
|
|
# server_condition = \
|
|
# ${extract {ADDRESS} \
|
|
# {${readsocket{/var/run/courier/authdaemon/socket} \
|
|
# {AUTH ${strlen:exim\nlogin\n$auth1\n$auth2\n}\nexim\nlogin\n$auth1\n$auth2\n} }} \
|
|
# {yes} \
|
|
# fail}
|
|
# server_set_id = $auth1
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
|
|
# This one is a bad hack to support the broken version 4.xx of
|
|
# Microsoft Outlook Express which violates the RFCs by demanding
|
|
# "250-AUTH=" instead of "250-AUTH ".
|
|
# If your list of offered authenticators is other than PLAIN and LOGIN,
|
|
# you need to adapt the public_name line manually.
|
|
# It has to be the last authenticator to work and has not been tested
|
|
# well. Use at your own risk.
|
|
# See the thread entry point from
|
|
# http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050214/msg00213.html
|
|
# for the related discussion on the exim-users mailing list.
|
|
# Thanks to Fred Viles for this great work.
|
|
|
|
# support_broken_outlook_express_4_server:
|
|
# driver = plaintext
|
|
# public_name = "\r\n250-AUTH=PLAIN LOGIN"
|
|
# server_prompts = User Name : Password
|
|
# server_condition = no
|
|
# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
|
|
# server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
|
|
# .endif
|
|
|
|
##############
|
|
# See /usr/share/doc/exim4-base/README.Debian.gz
|
|
##############
|
|
|
|
# These examples below are the equivalent for client side authentication.
|
|
# They get the passwords from CONFDIR/passwd.client, whose format is
|
|
# defined in exim4_passwd_client(5)
|
|
|
|
# Because AUTH PLAIN and AUTH LOGIN send the password in clear, we
|
|
# only allow these mechanisms over encrypted connections by default.
|
|
# You can set AUTH_CLIENT_ALLOW_NOTLS_PASSWORDS to allow unencrypted
|
|
# clear text password authentication on all connections.
|
|
|
|
cram_md5:
|
|
driver = cram_md5
|
|
public_name = CRAM-MD5
|
|
client_name = ${extract{1}{:}{${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$value}fail}}}
|
|
client_secret = ${extract{2}{:}{${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$value}fail}}}
|
|
|
|
# this returns the matching line from passwd.client and doubles all ^
|
|
PASSWDLINE=${sg{\
|
|
${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$value}fail}\
|
|
}\
|
|
{\\N[\\^]\\N}\
|
|
{^^}\
|
|
}
|
|
|
|
plain:
|
|
driver = plaintext
|
|
public_name = PLAIN
|
|
.ifndef AUTH_CLIENT_ALLOW_NOTLS_PASSWORDS
|
|
client_send = "<; ${if !eq{$tls_out_cipher}{}\
|
|
{^${extract{1}{:}{PASSWDLINE}}\
|
|
^${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}\
|
|
}fail}"
|
|
.else
|
|
client_send = "<; ^${extract{1}{:}{PASSWDLINE}}\
|
|
^${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}"
|
|
.endif
|
|
|
|
login:
|
|
driver = plaintext
|
|
public_name = LOGIN
|
|
.ifndef AUTH_CLIENT_ALLOW_NOTLS_PASSWORDS
|
|
# Return empty string if not non-TLS AND looking up $host in passwd-file
|
|
# yields a non-empty string; fail otherwise.
|
|
client_send = "<; ${if and{\
|
|
{!eq{$tls_out_cipher}{}}\
|
|
{!eq{PASSWDLINE}{}}\
|
|
}\
|
|
{}fail}\
|
|
; ${extract{1}{::}{PASSWDLINE}}\
|
|
; ${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}"
|
|
.else
|
|
# Return empty string if looking up $host in passwd-file yields a
|
|
# non-empty string; fail otherwise.
|
|
client_send = "<; ${if !eq{PASSWDLINE}{}\
|
|
{}fail}\
|
|
; ${extract{1}{::}{PASSWDLINE}}\
|
|
; ${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}"
|
|
.endif
|
|
#####################################################
|
|
### end auth/30_exim4-config_examples
|
|
#####################################################
|