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######################################################################
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# Runtime configuration file for Exim #
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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, on debian, the main binary is
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exim_path = /usr/sbin/exim4
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# Let Exim autodetect this
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# The next three settings create two lists of domains and one list of hosts.
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# These lists are referred to later in this configuration using the syntax
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# +local_domains, +relay_to_domains, and +relay_from_hosts, respectively. They
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# are all colon-separated lists:
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# '@' refers to 'the name of the local host'
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domainlist local_domains = DEBCONFlocal_domainsDEBCONF
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domainlist relay_to_domains = DEBCONFrelay_domainsDEBCONF
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hostlist relay_from_hosts = 127.0.0.1 : ::::1 : DEBCONFrelay_netsDEBCONF
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# Specify the domain you want to be added to all unqualified addresses
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# here. An unqualified address is one that does not contain an "@" character
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# followed by a domain. For example, "caesar@rome.example" is a fully qualified
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# address, but the string "caesar" (i.e. just a login name) is an unqualified
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# email address. Unqualified addresses are accepted only from local callers by
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# default. See the recipient_unqualified_hosts option if you want to permit
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# unqualified addresses from remote sources. If this option is not set, the
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# primary_hostname value is used for qualification.
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qualify_domain = DEBCONFvisiblenameDEBCONF
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# only used for satellite-system
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DCreadhost = DEBCONFreadhostDEBCONF
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#for satellite and smarthost-systems
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DCsmarthost = DEBCONFsmarthostDEBCONF
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# listen on all all interfaces?
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DEBCONFlistenonpublicDEBCONF
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### EXPANSION-ends ######################
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# The default delivery method. See /etc/exim4/conf.d/transports/ for other
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LOCAL_DELIVERY=mail_spool
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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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# This option defines the access control list that is run when an
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# SMTP RCPT command is received.
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acl_smtp_rcpt = acl_check_rcpt
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# If you want unqualified recipient addresses to be qualified with a different
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# domain to unqualified sender addresses, specify the recipient domain here.
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# If this option is not set, the qualify_domain value is used.
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# The following line must be uncommented if you want Exim to recognize
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# addresses of the form "user@[10.11.12.13]" that is, with a "domain literal"
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# (an IP address) instead of a named domain. The RFCs still require this form,
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# but it makes little sense to permit mail to be sent to specific hosts by
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# their IP address in the modern Internet. This ancient format has been used
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# by those seeking to abuse hosts by using them for unwanted relaying. If you
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# really do want to support domain literals, uncomment the following line, and
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# see also the "domain_literal" router below.
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# allow_domain_literals
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# The setting below causes Exim to do a reverse DNS lookup on all incoming
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# IP calls, in order to get the true host name. If you feel this is too
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# expensive, you can specify the networks for which a lookup is done, or
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# remove the setting entirely.
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# The settings below, which are actually the same as the defaults in the
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# code, cause Exim to make RFC 1413 (ident) callbacks for all incoming SMTP
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# calls. You can limit the hosts to which these calls are made, and/or change
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# the timeout that is used. If you set the timeout to zero, all RFC 1413 calls
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# are disabled. RFC 1413 calls are cheap and can provide useful information
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# for tracing problem messages, but some hosts and firewalls have problems
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# with them. This can result in a timeout instead of an immediate refused
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# connection, leading to delays on starting up an SMTP session.
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rfc1413_query_timeout = 30s
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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. If you want to accept
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# unqualified addresses (just a local part) from certain hosts, you can specify
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# these hosts by setting one or both of
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# sender_unqualified_hosts =
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# recipient_unqualified_hosts =
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# to control sender and recipient addresses, respectively. 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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# If you want Exim to support the "percent hack" for certain domains,
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# uncomment the following line and provide a list of domains. The "percent
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# hack" is the feature by which mail addressed to x%y@z (where z is one of
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# the domains listed) is locally rerouted to x@y and sent on. If z is not one
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# of the "percent hack" domains, x%y is treated as an ordinary local part. This
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# hack is rarely needed nowadays; you should not enable it unless you are sure
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# that you really need it.
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# percent_hack_domains =
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# When Exim can neither deliver a message nor return it to sender, it "freezes"
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# the delivery error message (aka "bounce message"). There are also other
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# circumstances in which messages get frozen. They will stay on the queue for
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# ever unless one of the following options is set.
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# This option unfreezes frozen bounce messages after two days, tries
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# once more to deliver them, and ignores any delivery failures.
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ignore_bounce_errors_after = 2d
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# This option cancels (removes) frozen messages that are older than a week.
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timeout_frozen_after = 7d
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freeze_tell = postmaster
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# uucp should be able to set envelope-from to arbitrary values
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received_header_text = "Received: \
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${if def:sender_rcvhost {from ${sender_rcvhost}\n\t}\
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{${if def:sender_ident {from ${sender_ident} }}\
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${if def:sender_helo_name {(helo=${sender_helo_name})\n\t}}}}\
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by ${primary_hostname} \
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${if def:received_protocol {with ${received_protocol}}} \
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(Exim ${version_number} #${compile_number} (Debian) [+prerelease])\n\t\
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${if def:received_for {\n\tfor <$received_for>}}"
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# No deliveries will ever be run under the uids of these users (a colon-
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# separated list). An attempt to do so causes a panic error to be logged, and
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# the delivery to be deferred. This is a paranoic safety catch. Note that the
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# default setting means you cannot deliver mail addressed to root as if it
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# were a normal user. This isn't usually a problem, as most sites have an alias
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# for root that redirects such mail to a human administrator.
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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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# This access control list is used for every RCPT command in an incoming
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# SMTP message. The tests are run in order until the address is either
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# accepted or denied.
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# Accept if the source is local SMTP (i.e. not over TCP/IP). We do this by
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# testing for an empty sending host field.
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# Deny if the local part contains @ or % or / or | or !. These are rarely
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# found in genuine local parts, but are often tried by people looking to
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# circumvent relaying restrictions.
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# Also deny if the local part starts with a dot. Empty components aren't
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# strictly legal in RFC 2822, but Exim allows them because this is common.
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# However, actually starting with a dot may cause trouble if the local part
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# is used as a file name (e.g. for a mailing list).
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deny local_parts = ^.*[@%!/|] : ^\\.
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# Accept mail to postmaster in any local domain, regardless of the source,
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# and without verifying the sender.
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accept local_parts = postmaster
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domains = +local_domains
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# Deny unless the sender address can be verified.
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# require verify = sender
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#############################################################################
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# There are no checks on DNS "black" lists because the domains that contain
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# these lists are changing all the time. However, here are two examples of
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# how you could get Exim to perform a DNS black list lookup at this point.
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# The first one denies, while the second just warns.
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# deny message = rejected because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
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# dnslists = black.list.example
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# warn message = X-Warning: $sender_host_address is in a black list at $dnslist_domain
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# log_message = found in $dnslist_domain
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# dnslists = black.list.example
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#############################################################################
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# Accept if the address is in a local domain, but only if the recipient can
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# be verified. Otherwise deny. The "endpass" line is the border between
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# passing on to the next ACL statement (if tests above it fail) or denying
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# access (if tests below it fail).
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accept domains = +local_domains
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message = unknown user
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# Accept if the address is in a domain for which we are relaying, but again,
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# only if the recipient can be verified.
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accept domains = +relay_to_domains
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message = unrouteable address
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# If control reaches this point, the domain is neither in +local_domains
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# nor in +relay_to_domains.
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# Accept if the message comes from one of the hosts for which we are an
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# outgoing relay. Recipient verification is omitted here, because in many
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# cases the clients are dumb MUAs that don't cope well with SMTP error
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# responses. If you are actually relaying out from MTAs, you should probably
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# add recipient verification here.
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accept hosts = +relay_from_hosts
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# Accept if the message arrived over an authenticated connection, from
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# any host. Again, these messages are usually from MUAs, so recipient
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# verification is omitted.
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accept authenticated = *
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# Reaching the end of the ACL causes a "deny", but we might as well give
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# an explicit message.
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deny message = relay not permitted
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######################################################################
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# ROUTERS CONFIGURATION #
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# Specifies how addresses are handled #
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######################################################################
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# THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT! #
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# An address is passed to each router in turn until it is accepted. #
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######################################################################
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# This router routes to remote hosts over SMTP by explicit IP address,
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# when an email address is given in "domain literal" form, for example,
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# <user@[192.168.35.64]>. The RFCs require this facility. However, it is
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# little-known these days, and has been exploited by evil people seeking
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# to abuse SMTP relays. Consequently it is commented out in the default
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# configuration. If you uncomment this router, you also need to uncomment
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# allow_domain_literals above, so that Exim can recognize the syntax of
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# domain literal addresses.
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# domains = ! +local_domains
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# transport = remote_smtp
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domains = ! +local_domains
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transport = remote_smtp
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route_list = * DCsmarthost
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host_find_failed = defer
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# The "no_more" above means that all routers below here are for
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# domains in the local_domains list, i.e. just like Exim 3 directors.
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local_part_prefix = real-
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transport = LOCAL_DELIVERY
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# This router handles aliasing using a traditional /etc/aliases file.
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##### NB You must ensure that /etc/aliases exists. It used to be the case
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##### NB that every Unix had that file, because it was the Sendmail default.
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##### NB These days, there are systems that don't have it. Your aliases
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##### NB file should at least contain an alias for "postmaster".
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# If any of your aliases expand to pipes or files, you will need to set
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# up a user and a group for these deliveries to run under. You can do
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# this by uncommenting the "user" option below (changing the user name
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# as appropriate) and adding a "group" option if necessary. Alternatively, you
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# can specify "user" on the transports that are used. Note that the transports
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# listed below are the same as are used for .forward files; you might want
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# to set up different ones for pipe and file deliveries from aliases.
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data = ${lookup{$local_part}lsearch{/etc/aliases}}
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file_transport = address_file
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pipe_transport = address_pipe
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data = ${local_part}@DCreadhost
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# This router handles forwarding using traditional .forward files in users'
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# home directories. If you want it also to allow mail filtering when a forward
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# file starts with the string "# Exim filter", uncomment the "allow_filter"
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# The no_verify setting means that this router is skipped when Exim is
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# verifying addresses. Similarly, no_expn means that this router is skipped if
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# Exim is processing an EXPN command.
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# The check_ancestor option means that if the forward file generates an
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# address that is an ancestor of the current one, the current one gets
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# passed on instead. This covers the case where A is aliased to B and B
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# has a .forward file pointing to A.
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# The three transports specified at the end are those that are used when
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# forwarding generates a direct delivery to a file, or to a pipe, or sets
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# up an auto-reply, respectively.
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file = $home/.forward
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file_transport = address_file
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pipe_transport = address_pipe
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reply_transport = address_reply
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transport = procmail_pipe
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require_files = ${local_part}:${home}/.procmailrc:+/usr/bin/procmail
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# transport = maildrop_pipe
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# require_files = ${local_part}:${home}/.mailfilter:+/usr/bin/maildrop
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transport = LOCAL_DELIVERY
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######################################################################
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# TRANSPORTS CONFIGURATION #
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######################################################################
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# ORDER DOES NOT MATTER #
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# Only one appropriate transport is called for each delivery. #
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######################################################################
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# A transport is used only when referenced from a router that successfully
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# handles an address.
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# This transport is used for handling deliveries directly to files that are
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# generated by aliasing or forwarding.
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# This transport is used for handling pipe deliveries generated by alias or
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# .forward files. If the pipe generates any standard output, it is returned
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# to the sender of the message as a delivery error. Set return_fail_output
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# instead of return_output if you want this to happen only when the pipe fails
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# to complete normally. You can set different transports for aliases and
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# forwards if you want to - see the references to address_pipe in the routers
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# This transport is used for handling autoreplies generated by the filtering
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# option of the userforward router.
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# This transport is used for local delivery to user mailboxes in traditional
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# BSD mailbox format.
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file = /var/mail/$local_part
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# Use this instead of mail_spool if you want to to deliver to Maildir in
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# home-directory - change the definition of LOCAL_DELIVERY
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directory = $home/Maildir
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path = "/bin:/usr/bin:/usr/local/bin"
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command = "/usr/bin/maildrop"
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path = "/bin:/usr/bin:/usr/local/bin"
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command = "/usr/bin/procmail"
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# This transport is used for delivering messages over SMTP connections.
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######################################################################
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# RETRY CONFIGURATION #
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######################################################################
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# This single retry rule applies to all domains and all errors. It specifies
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# retries every 15 minutes for 2 hours, then increasing retry intervals,
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# starting at 1 hour and increasing each time by a factor of 1.5, up to 16
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# hours, then retries every 6 hours until 4 days have passed since the first
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# Domain Error Retries
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# ------ ----- -------
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* * F,2h,15m; G,16h,1h,1.5; F,4d,6h
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######################################################################
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# REWRITE CONFIGURATION #
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######################################################################
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######################################################################
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# AUTHENTICATION CONFIGURATION #
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######################################################################
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debian/exim4-config-simple/debian/exim4.conf.source
