Skip to content
Snippets Groups Projects
exim4.conf.template 82.7 KiB
Newer Older
MAIN_TLS_ENABLE = 1
MAIN_TLS_CERTIFICATE = /etc/apache2/{{ apache_certificate_stem }}+chain.crt
MAIN_TLS_PRIVATEKEY  = /etc/apache2/{{ apache_certificate_stem }}.key

# Log into the default log files and to syslog (journal)
log_file_path = :syslog

# Mailman integration based on http://www.exim.org/howto/mailman21.html
# FIXME go beyond the basic section of the HOWTO
MM_HOME=/var/lib/mailman
MM_UID=list
MM_GID=list
domainlist mm_domains = {{ list_domain }}

MM_WRAP=MM_HOME/mail/mailman
MM_LISTCHK=MM_HOME/lists/${lc::$local_part}/config.pck

CHECK_RCPT_VERIFY_SENDER = 1
spamd_address = rspamd.mail.einfra.hu 11333 variant=rspamd

#####################################################
### main/01_exim4-config_listmacrosdefs
#####################################################
######################################################################
#      Runtime configuration file for Exim 4 (Debian Packaging)      #
######################################################################

######################################################################
# /etc/exim4/exim4.conf.template is only used with the non-split
#   configuration scheme.
# /etc/exim4/conf.d/main/01_exim4-config_listmacrosdefs is only used
#   with the split configuration scheme.
# If you find this comment anywhere else, somebody copied it there.
# Documentation about the Debian exim4 configuration scheme can be
# found in /usr/share/doc/exim4-base/README.Debian.gz.
######################################################################

######################################################################
#                    MAIN CONFIGURATION SETTINGS                     #
######################################################################

# Just for reference and scripts. 
# On Debian systems, the main binary is installed as exim4 to avoid
# conflicts with the exim 3 packages.
exim_path = /usr/sbin/exim4

# Macro defining the main configuration directory.
# We do not use absolute paths.
.ifndef CONFDIR
CONFDIR = /etc/exim4
.endif

# debconf-driven macro definitions get inserted after this line
UPEX4CmacrosUPEX4C = 1

# Create domain and host lists for relay control
# '@' refers to 'the name of the local host'

# List of domains considered local for exim. Domains not listed here
# need to be deliverable remotely.
domainlist local_domains = MAIN_LOCAL_DOMAINS : +mm_domains
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723

# List of recipient domains to relay _to_. Use this list if you're -
# for example - fallback MX or mail gateway for domains.
domainlist relay_to_domains = MAIN_RELAY_TO_DOMAINS

# List of sender networks (IP addresses) to _unconditionally_ relay
# _for_. If you intend to be SMTP AUTH server, you do not need to enter
# anything here.
hostlist relay_from_hosts = MAIN_RELAY_NETS


# Decide which domain to use to add to all unqualified addresses.
# If MAIN_PRIMARY_HOSTNAME_AS_QUALIFY_DOMAIN is defined, the primary
# hostname is used. If not, but MAIN_QUALIFY_DOMAIN is set, the value
# of MAIN_QUALIFY_DOMAIN is used. If both macros are not defined,
# the first line of /etc/mailname is used.
.ifndef MAIN_PRIMARY_HOSTNAME_AS_QUALIFY_DOMAIN
.ifndef MAIN_QUALIFY_DOMAIN
qualify_domain = ETC_MAILNAME
.else
qualify_domain = MAIN_QUALIFY_DOMAIN
.endif
.endif

# listen on all all interfaces?
.ifdef MAIN_LOCAL_INTERFACES
local_interfaces = MAIN_LOCAL_INTERFACES
.endif

.ifndef LOCAL_DELIVERY
# The default transport, set in /etc/exim4/update-exim4.conf.conf,
# defaulting to mail_spool. See CONFDIR/conf.d/transport/ for possibilities
LOCAL_DELIVERY=mail_spool
.endif

# The gecos field in /etc/passwd holds not only the name. see passwd(5).
gecos_pattern = ^([^,:]*)
gecos_name = $1

# always log tls_peerdn as we use TLS for outgoing connects by default
.ifndef MAIN_LOG_SELECTOR
MAIN_LOG_SELECTOR = +smtp_protocol_error +smtp_syntax_error +tls_certificate_verified +tls_peerdn
.endif
#####################################################
### end main/01_exim4-config_listmacrosdefs
#####################################################
#####################################################
### main/02_exim4-config_options
#####################################################

### main/02_exim4-config_options
#################################


# Defines the access control list that is run when an
# SMTP MAIL command is received.
#
.ifndef MAIN_ACL_CHECK_MAIL
MAIN_ACL_CHECK_MAIL = acl_check_mail
.endif
acl_smtp_mail = MAIN_ACL_CHECK_MAIL


# Defines the access control list that is run when an
# SMTP RCPT command is received.
#
.ifndef MAIN_ACL_CHECK_RCPT
MAIN_ACL_CHECK_RCPT = acl_check_rcpt
.endif
acl_smtp_rcpt = MAIN_ACL_CHECK_RCPT


# Defines the access control list that is run when an
# SMTP DATA command is received.
#
.ifndef MAIN_ACL_CHECK_DATA
MAIN_ACL_CHECK_DATA = acl_check_data
.endif
acl_smtp_data = MAIN_ACL_CHECK_DATA


# Message size limit. The default (used when MESSAGE_SIZE_LIMIT
# is unset) is 50 MB
.ifdef MESSAGE_SIZE_LIMIT
message_size_limit = MESSAGE_SIZE_LIMIT
.endif


# If you are running exim4-daemon-heavy or a custom version of Exim that
# was compiled with the content-scanning extension, you can cause incoming
# messages to be automatically scanned for viruses. You have to modify the
# configuration in two places to set this up. The first of them is here,
# where you define the interface to your scanner. This example is typical
# for ClamAV; see the manual for details of what to set for other virus
# scanners. The second modification is in the acl_check_data access
# control list.

# av_scanner = clamd:/var/run/clamav/clamd.ctl


# For spam scanning, there is a similar option that defines the interface to
# SpamAssassin. You do not need to set this if you are using the default, which
# is shown in this commented example. As for virus scanning, you must also
# modify the acl_check_data access control list to enable spam scanning.

# spamd_address = 127.0.0.1 783

# Domain used to qualify unqualified recipient addresses
# If this option is not set, the qualify_domain value is used.
# qualify_recipient = <value of qualify_domain>


# Allow Exim to recognize addresses of the form "user@[10.11.12.13]",
# where the domain part is a "domain literal" (an IP address) instead
# of a named domain. 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 a special router, which is automatically
# enabled if you use the enable macro MAIN_ALLOW_DOMAIN_LITERALS.
# Additionally, you might want to make your local IP addresses (or @[])
# local domains.
.ifdef MAIN_ALLOW_DOMAIN_LITERALS
allow_domain_literals
.endif


# Do a reverse DNS lookup on all incoming IP calls, in order to get the
# true host name. If you feel this is too expensive, the networks for
# which a lookup is done can be listed here.
.ifndef DC_minimaldns
.ifndef MAIN_HOST_LOOKUP
MAIN_HOST_LOOKUP = *
.endif
host_lookup = MAIN_HOST_LOOKUP
.endif

# The setting below causes Exim to try to initialize the system resolver
# library with DNSSEC support.  It has no effect if your library lacks
# DNSSEC support.
dns_dnssec_ok = 1

# In a minimaldns setup, update-exim4.conf guesses the hostname and
# dumps it here to avoid DNS lookups being done at Exim run time.
.ifdef MAIN_HARDCODE_PRIMARY_HOSTNAME
primary_hostname = MAIN_HARDCODE_PRIMARY_HOSTNAME
.endif

# The settings below cause Exim to make RFC 1413 (ident) callbacks
# for all incoming SMTP calls. You can limit the hosts to which these
# calls are made, and/or change the timeout that is used. If you set
# the timeout to zero, all RFC 1413 calls are disabled. RFC 1413 calls
# are cheap and can provide useful information for tracing problem
# messages, but some hosts and firewalls have problems with them.
# This can result in a timeout instead of an immediate refused
# connection, leading to delays on starting up SMTP sessions.
# (The default was reduced from 30s to 5s for release 4.61. and to
# disabled for release 4.86)
#
#rfc1413_hosts = *
#rfc1413_query_timeout = 5s


# Enable an efficiency feature.  We advertise the feature; clients
# may request to use it.  For multi-recipient mails we then can
# reject or accept per-user after the message is received.
#
prdr_enable = true

# When using an external relay tester (such as rt.njabl.org and/or the
# currently defunct relay-test.mail-abuse.org, the test may be aborted
# since exim complains about "too many nonmail commands". If you want
# the test to complete, add the host from where "your" relay tester
# connects from to the MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS macro.
# Please note that a non-empty setting may cause extra DNS lookups to
# happen, which is the reason why this option is commented out in the
# default settings.
# MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS = !rt.njabl.org
.ifdef MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS
smtp_accept_max_nonmail_hosts = MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS
.endif

# By default, exim forces a Sender: header containing the local
# account name at the local host name in all locally submitted messages
# that don't have the local account name at the local host name in the
# From: header, deletes any Sender: header present in the submitted
# message and forces the envelope sender of all locally submitted
# messages to the local account name at the local host name.
# The following settings allow local users to specify their own envelope sender
# in a locally submitted message. Sender: headers existing in a locally
# submitted message are not removed, and no automatic Sender: headers
# are added. These settings are fine for most hosts.
# If you run exim on a classical multi-user systems where all users
# have local mailboxes that can be reached via SMTP from the Internet
# with the local FQDN as the domain part of the address, you might want
# to disable the following three lines for traceability reasons.
.ifndef MAIN_FORCE_SENDER
local_from_check = false
local_sender_retain = true
untrusted_set_sender = *
.endif


# By default, Exim expects all envelope addresses to be fully qualified, that
# is, they must contain both a local part and a domain. Configure exim
# to accept unqualified addresses from certain hosts. When this is done,
# unqualified addresses are qualified using the settings of qualify_domain
# and/or qualify_recipient (see above).
# sender_unqualified_hosts = <unset>
# recipient_unqualified_hosts = <unset>


# Configure Exim to support the "percent hack" for certain domains.
# The "percent hack" is the feature by which mail addressed to x%y@z
# (where z is one of the domains listed) is locally rerouted to x@y
# and sent on. If z is not one of the "percent hack" domains, x%y is
# treated as an ordinary local part. The percent hack is rarely needed
# nowadays but frequently abused. You should not enable it unless you
# are sure that you really need it.
# percent_hack_domains = <unset>


# Bounce handling
.ifndef MAIN_IGNORE_BOUNCE_ERRORS_AFTER
MAIN_IGNORE_BOUNCE_ERRORS_AFTER = 2d
.endif
ignore_bounce_errors_after = MAIN_IGNORE_BOUNCE_ERRORS_AFTER

.ifndef MAIN_TIMEOUT_FROZEN_AFTER
MAIN_TIMEOUT_FROZEN_AFTER = 7d
.endif
timeout_frozen_after = MAIN_TIMEOUT_FROZEN_AFTER

.ifndef MAIN_FREEZE_TELL
MAIN_FREEZE_TELL = postmaster
.endif
freeze_tell = MAIN_FREEZE_TELL


# Define spool directory
.ifndef SPOOLDIR
SPOOLDIR = /var/spool/exim4
.endif
spool_directory = SPOOLDIR


# trusted users can set envelope-from to arbitrary values
.ifndef MAIN_TRUSTED_USERS
MAIN_TRUSTED_USERS = uucp
.endif
trusted_users = MAIN_TRUSTED_USERS
.ifdef MAIN_TRUSTED_GROUPS
trusted_groups = MAIN_TRUSTED_GROUPS
.endif


# users in admin group can do many other things
# admin_groups = <unset>


# SMTP Banner. The example includes the Debian version in the SMTP dialog
# MAIN_SMTP_BANNER = "${primary_hostname} ESMTP Exim ${version_number} (Debian package MAIN_PACKAGE_VERSION) ${tod_full}"
# smtp_banner = $smtp_active_hostname ESMTP Exim $version_number $tod_full

.ifdef MAIN_KEEP_ENVIRONMENT
keep_environment = MAIN_KEEP_ENVIRONMENT
.else
# set option to empty value to avoid warning.
keep_environment =
.endif
.ifdef MAIN_ADD_ENVIRONMENT
add_environment = MAIN_ADD_ENVIRONMENT
.endif
#####################################################
### end main/02_exim4-config_options
#####################################################
#####################################################
### main/03_exim4-config_tlsoptions
#####################################################

### main/03_exim4-config_tlsoptions
#################################

# TLS/SSL configuration for exim as an SMTP server.
# See /usr/share/doc/exim4-base/README.Debian.gz for explanations.

.ifdef MAIN_TLS_ENABLE
# Defines what hosts to 'advertise' STARTTLS functionality to. The
# default, *, will advertise to all hosts that connect with EHLO.
.ifndef MAIN_TLS_ADVERTISE_HOSTS
MAIN_TLS_ADVERTISE_HOSTS = *
.endif
tls_advertise_hosts = MAIN_TLS_ADVERTISE_HOSTS


# Full paths to Certificate and Private Key. The Private Key file
# must be kept 'secret' and should be owned by root.Debian-exim mode
# 640 (-rw-r-----). exim-gencert takes care of these prerequisites.
# Normally, exim4 looks for certificate and key in different files:
#   MAIN_TLS_CERTIFICATE - path to certificate file,
#                          CONFDIR/exim.crt if unset
#   MAIN_TLS_PRIVATEKEY  - path to private key file
#                          CONFDIR/exim.key if unset
# You can also configure exim to look for certificate and key in the
# same file, set MAIN_TLS_CERTKEY to that file to enable. This takes
# precedence over all other settings regarding certificate and key file.
.ifdef MAIN_TLS_CERTKEY
tls_certificate = MAIN_TLS_CERTKEY
.else
.ifndef MAIN_TLS_CERTIFICATE
MAIN_TLS_CERTIFICATE = CONFDIR/exim.crt
.endif
tls_certificate = MAIN_TLS_CERTIFICATE

.ifndef MAIN_TLS_PRIVATEKEY
MAIN_TLS_PRIVATEKEY = CONFDIR/exim.key
.endif
tls_privatekey = MAIN_TLS_PRIVATEKEY
.endif

# Pointer to the CA Certificates against which client certificates are
# checked. This is controlled by the `tls_verify_hosts' and
# `tls_try_verify_hosts' lists below.
# If you want to check server certificates, you need to add an
# tls_verify_certificates statement to the smtp transport.
# /etc/ssl/certs/ca-certificates.crt is generated by
# the "ca-certificates" package's update-ca-certificates(8) command.
.ifndef MAIN_TLS_VERIFY_CERTIFICATES
MAIN_TLS_VERIFY_CERTIFICATES = ${if exists{/etc/ssl/certs/ca-certificates.crt}\
                                    {/etc/ssl/certs/ca-certificates.crt}\
				    {/dev/null}}
.endif
tls_verify_certificates = MAIN_TLS_VERIFY_CERTIFICATES


# A list of hosts which are constrained by `tls_verify_certificates'. A host
# that matches `tls_verify_host' must present a certificate that is
# verifyable through `tls_verify_certificates' in order to be accepted as an
# SMTP client. If it does not, the connection is aborted.
.ifdef MAIN_TLS_VERIFY_HOSTS
tls_verify_hosts = MAIN_TLS_VERIFY_HOSTS
.endif

# A weaker form of checking: if a client matches `tls_try_verify_hosts' (but
# not `tls_verify_hosts'), request a certificate and check it against
# `tls_verify_certificates' but do not abort the connection if there is no
# certificate or if the certificate presented does not match. (This
# condition can be tested for in ACLs through `verify = certificate')
# By default, this check is done for all hosts. It is known that some
# clients (including incredimail's version downloadable in February
# 2008) choke on this. To disable, set MAIN_TLS_TRY_VERIFY_HOSTS to an
# empty value.
.ifdef MAIN_TLS_TRY_VERIFY_HOSTS
tls_try_verify_hosts = MAIN_TLS_TRY_VERIFY_HOSTS
.endif

.ifdef _HAVE_GNUTLS
tls_dhparam = historic
.endif

.else
# Don't advertise TLS if MAIN_TLS_ENABLE is not set.
tls_advertise_hosts =
.endif
#####################################################
### end main/03_exim4-config_tlsoptions
#####################################################
#####################################################
### main/90_exim4-config_log_selector
#####################################################

### main/90_exim4-config_log_selector
#################################

# uncomment this for debugging
# MAIN_LOG_SELECTOR == MAIN_LOG_SELECTOR +all -subject -arguments

.ifdef MAIN_LOG_SELECTOR
log_selector = MAIN_LOG_SELECTOR
.endif
#####################################################
### end main/90_exim4-config_log_selector
#####################################################
#####################################################
### acl/00_exim4-config_header
#####################################################

######################################################################
#                       ACL CONFIGURATION                            #
#         Specifies access control lists for incoming SMTP mail      #
######################################################################
begin acl


#####################################################
### end acl/00_exim4-config_header
#####################################################
#####################################################
### acl/20_exim4-config_local_deny_exceptions
#####################################################

### acl/20_exim4-config_local_deny_exceptions
#################################

# This is used to determine whitelisted senders and hosts.
# It checks for CONFDIR/host_local_deny_exceptions and
# CONFDIR/sender_local_deny_exceptions.
#
# It is meant to be used from some other acl entry.
#
# See exim4-config_files(5) for details.
#
# 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
#################################

# define macros to be used below in this file to check recipient
# local parts for strange characters. Documentation below.
# This blocks local parts that begin with a dot or contain a quite
# broad range of non-alphanumeric characters.

.ifndef CHECK_RCPT_LOCAL_LOCALPARTS
CHECK_RCPT_LOCAL_LOCALPARTS = ^[.] : ^.*[@%!/|`#&?]
.endif

.ifndef CHECK_RCPT_REMOTE_LOCALPARTS
CHECK_RCPT_REMOTE_LOCALPARTS = ^[./|] : ^.*[@%!`#&?] : ^.*/\\.\\./
.endif

# 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 RFC5322 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
  # at the top of this file.
  .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.
  # Actually, don't even accept our local domains except for the Mailman ones.
  require
    message = relay not permitted
    domains = +mm_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
    log_message = sender envelope address is locally blacklisted.
    !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
    log_message = sender IP address is locally blacklisted.
    !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 if the headers contain badly-formed addresses.
  #
  .ifndef NO_CHECK_DATA_VERIFY_HEADER_SYNTAX
  deny
    !acl = acl_local_deny_exceptions
    !verify = header_syntax
    message = header syntax
    log_message = header syntax ($acl_verify_message)
  .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 may 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. See
  # /usr/share/doc/exim4-base/README.Debian.gz
  #
  # See the exim docs and the exim wiki for more suitable examples.
  #
  # # Remove internal headers
  # warn
  #   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : \
  #                   X-Spam_report
  #
  # warn
  #   condition = ${if <{$message_size}{120k}{1}{0}}
  #   # ":true" to add headers/acl variables even if not spam
  #   spam = nobody:true
  #   add_header = X-Spam_score: $spam_score
  #   add_header = X-Spam_bar: $spam_bar
  #   # Do not enable this unless you have shorted SpamAssassin's report
  #   #add_header = X-Spam_report: $spam_report
  #
  # Reject spam messages (score >15.0).
  # This breaks mailing list and forward messages.
  # deny
  #   message = Classified as spam (score $spam_score)
  #   condition = ${if <{$message_size}{120k}{1}{0}}
  #   condition = ${if >{$spam_score_int}{150}{true}{false}}


  # 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