conf.d/main/02_exim4-config_options

   1
   2 ### main/02_exim4-config_options
   3 #################################
   4
   5
   6 # Defines the access control list that is run when an
   7 # SMTP RCPT command is received.
   8 #
   9 .ifndef MAIN_ACL_CHECK_RCPT
  10 MAIN_ACL_CHECK_RCPT = acl_check_rcpt
  11 .endif
  12 acl_smtp_rcpt = MAIN_ACL_CHECK_RCPT
  13
  14
  15 # Defines the access control list that is run when an
  16 # SMTP DATA command is received.
  17 #
  18 .ifndef MAIN_ACL_CHECK_DATA
  19 MAIN_ACL_CHECK_DATA = acl_check_data
  20 .endif
  21 acl_smtp_data = MAIN_ACL_CHECK_DATA
  22
  23
  24 # Message size limit. The default (used when MESSAGE_SIZE_LIMIT
  25 # is unset) is 50 MB
  26 .ifdef MESSAGE_SIZE_LIMIT
  27 message_size_limit = MESSAGE_SIZE_LIMIT
  28 .endif
  29
  30
  31 # Domain used to qualify unqualified recipient addresses
  32 # If this option is not set, the qualify_domain value is used.
  33 # qualify_recipient = <value of qualify_domain>
  34
  35
  36 # Allow Exim to recognize addresses of the form "user@[10.11.12.13]",
  37 # where the domain part is a "domain literal" (an IP address) instead
  38 # of a named domain. The RFCs require this facility, but it is disabled
  39 # in the default config since it is seldomly used and frequently abused.
  40 # Domain literal support also needs a special router, which is automatically
  41 # enabled if you use the enable macro MAIN_ALLOW_DOMAIN_LITERALS.
  42 .ifdef MAIN_ALLOW_DOMAIN_LITERALS
  43 allow_domain_literals
  44 .endif
  45
  46
  47 # Do a reverse DNS lookup on all incoming IP calls, in order to get the
  48 # true host name. If you feel this is too expensive, the networks for
  49 # which a lookup is done can be listed here.
  50 .ifndef DC_minimaldns
  51 .ifndef MAIN_HOST_LOOKUP
  52 MAIN_HOST_LOOKUP = *
  53 .endif
  54 host_lookup = MAIN_HOST_LOOKUP
  55 .endif
  56
  57
  58 # In a minimaldns setup, update-exim4.conf guesses the hostname and
  59 # dumps it here to avoid DNS lookups being done at Exim run time.
  60 DEBCONF_hardcode_primary_hostname_DEBCONF
  61
  62
  63 # Do RFC 1413 (ident) callbacks for incoming SMTP calls. The default
  64 # is to do lookups for all hosts with a timeout of 30 seconds.
  65 # The options can be used to limit the hosts to which these calls are
  66 # made, and/or change the timeout that is used. If the timeout is zero,
  67 # no RFC 1413 calls are made. RFC 1413 calls are cheap and can provide
  68 # useful information for tracing problem messages, but some hosts and
  69 # firewalls are misconfigured to drop the requests instead of either
  70 # answering or rejecting them. This can result in timeouts, leading to
  71 # delays on starting up an SMTP session and to strange behavior in
  72 # settings where SMTP callouts are used.
  73 # rfc1413_hosts = *
  74 # rfc1413_query_timeout = 30s
  75
  76
  77 # By default, exim forces a Sender: header containing the local
  78 # account name at the local host name in all locally submitted messages
  79 # that don't have the local account name at the local host name in the
  80 # From: header, deletes any Sender: header present in the submitted
  81 # message and forces the envelope sender of all locally submitted
  82 # messages to the local account name at the local host name.
  83 # The following settings allow local users to specify their own envelope sender
  84 # in a locally submitted message. Sender: headers existing in a locally
  85 # submitted message are not removed, and no automatic Sender: headers
  86 # are added. These settings are fine for most hosts.
  87 # If you run exim on a classical multi-user systems where all users
  88 # have local mailboxes that can be reached via SMTP from the Internet
  89 # with the local FQDN as the domain part of the address, you might want
  90 # to disable the following three lines for traceability reasons.
  91 .ifndef MAIN_FORCE_SENDER
  92 local_from_check = false
  93 local_sender_retain = true
  94 untrusted_set_sender = *
  95 .endif
  96
  97
  98 # By default, Exim expects all envelope addresses to be fully qualified, that
  99 # is, they must contain both a local part and a domain. Configure exim
 100 # to accept unqualified addresses from certain hosts. When this is done,
 101 # unqualified addresses are qualified using the settings of qualify_domain
 102 # and/or qualify_recipient (see above).
 103 # sender_unqualified_hosts = <unset>
 104 # recipient_unqualified_hosts = <unset>
 105
 106
 107 # Configure Exim to support the "percent hack" for certain domains.
 108 # The "percent hack" is the feature by which mail addressed to x%y@z
 109 # (where z is one of the domains listed) is locally rerouted to x@y
 110 # and sent on. If z is not one of the "percent hack" domains, x%y is
 111 # treated as an ordinary local part. The percent hack is rarely needed
 112 # nowadays but frequently abused. You should not enable it unless you
 113 # are sure that you really need it.
 114 # percent_hack_domains = <unset>
 115
 116
 117 # Bounce handling
 118 .ifndef MAIN_IGNORE_BOUNCE_ERRORS_AFTER
 119 MAIN_IGNORE_BOUNCE_ERRORS_AFTER = 2d
 120 .endif
 121 ignore_bounce_errors_after = MAIN_IGNORE_BOUNCE_ERRORS_AFTER
 122
 123 .ifndef MAIN_TIMEOUT_FROZEN_AFTER
 124 MAIN_TIMEOUT_FROZEN_AFTER = 7d
 125 .endif
 126 timeout_frozen_after = MAIN_TIMEOUT_FROZEN_AFTER
 127
 128 .ifndef MAIN_FREEZE_TELL
 129 MAIN_FREEZE_TELL = postmaster
 130 .endif
 131 freeze_tell = MAIN_FREEZE_TELL
 132
 133
 134 # Define spool directory
 135 .ifndef SPOOLDIR
 136 SPOOLDIR = /var/spool/exim4
 137 .endif
 138 spool_directory = SPOOLDIR
 139
 140
 141 # trusted users can set envelope-from to arbitrary values
 142 .ifndef MAIN_TRUSTED_USERS
 143 MAIN_TRUSTED_USERS = uucp
 144 .endif
 145 trusted_users = MAIN_TRUSTED_USERS
 146 .ifdef MAIN_TRUSTED_GROUPS
 147 trusted_groups = MAIN_TRUSTED_GROUPS
 148 .endif
 149
 150
 151 # users in admin group can do many other things
 152 # admin_groups = <unset>
 153
 154
 155 # customize logging. See spec.txt 48.15.
 156 # If you want to debug, it is probably a good idea to set this to
 157 # "+all -subject -arguments".
 158 # If you use TLS, it might be a good idea to set "+tls_cipher
 159 # +tls_peerdn".
 160 # log_selector = <unset>
 161
 162
 163 # SMTP Banner. The example includes the Debian version in the SMTP dialog
 164 # MAIN_SMTP_BANNER = "${primary_hostname} ESMTP Exim ${version_number} (Debian package DEBCONFpackageversionDEBCONF) ${tod_full}"
 165 # smtp_banner = $smtp_active_hostname ESMTP Exim $version_number $tod_full