# configuration file. There are many more than are mentioned here. The
# manual is in the file doc/spec.txt in the Exim distribution as a plain
# ASCII file. Other formats (PostScript, Texinfo, HTML, PDF) are available
-# from the Exim ftp sites. The manual is also online at the Exim web sites.
+# from the Exim ftp sites. The manual is also online at the Exim website.
# This file is divided into several parts, all but the first of which are
# manual for details. The lists above are used in the access control lists for
# checking incoming messages. The names of these ACLs are defined here:
-acl_smtp_rcpt = acl_check_rcpt
-acl_smtp_data = acl_check_data
+acl_smtp_rcpt = acl_check_rcpt
+.ifdef _HAVE_PRDR
+acl_smtp_data_prdr = acl_check_prdr
+.endif
+acl_smtp_data = acl_check_data
# You should not change those settings until you understand how ACLs work.
# tls_privatekey = /etc/ssl/exim.pem
# For OpenSSL, prefer EC- over RSA-authenticated ciphers
-# tls_require_ciphers = ECDSA:RSA:!COMPLEMENTOFDEFAULT
+.ifdef _HAVE_OPENSSL
+tls_require_ciphers = ECDSA:RSA:!COMPLEMENTOFDEFAULT
+.endif
+
+# Don't offer resumption to (most) MUAs, who we don't want to reuse
+# tickets. Once the TLS extension for vended ticket numbers comes
+# though, re-examine since resumption on a single-use ticket is still a benefit.
+.ifdef _HAVE_TLS_RESUME
+tls_resumption_hosts = ${if inlist {$received_port}{587:465} {:}{*}}
+.endif
# In order to support roaming users who wish to send email from anywhere,
# you may want to make Exim listen on other ports as well as port 25, in
# 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.
+# This supports recipient-dependent content filtering; without it
+# you have to temp-reject any recipients after the first that have
+# incompatible filtering, and do the filtering in the data ACL.
+# Even with this enabled, you must support the old style for peers
+# not flagging support for PRDR (visible via $prdr_requested).
#
+.ifdef _HAVE_PRDR
prdr_enable = true
+.endif
# By default, Exim expects all envelope addresses to be fully qualified, that
# detail than the default. Adjust to suit.
log_selector = +smtp_protocol_error +smtp_syntax_error \
- +tls_certificate_verified
+ +tls_certificate_verified
# If you want Exim to support the "percent hack" for certain domains,
# By default, messages that are waiting on Exim's queue are all held in a
-# single directory called "input" which it itself within Exim's spool
+# single directory called "input" which is itself within Exim's spool
# directory. (The default spool directory is specified when Exim is built, and
# is often /var/spool/exim/.) Exim works best when its queue is kept short, but
# there are circumstances where this is not always possible. If you uncomment
# Insist that a HELO/EHLO was accepted.
- require message = nice hosts say HELO first
- condition = ${if def:sender_helo_name}
+ 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
# examples of how you can get Exim to perform a DNS black list lookup at this
# point. The first one denies, whereas the second just warns.
#
- # deny message = rejected because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
- # dnslists = black.list.example
+ # deny dnslists = black.list.example
+ # message = rejected because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
#
# warn dnslists = black.list.example
# add_header = X-Warning: $sender_host_address is in a black list at $dnslist_domain
# require verify = csa
#############################################################################
+ #############################################################################
+ # If doing per-user content filtering then recipients with filters different
+ # to the first recipient must be deferred unless the sender talks PRDR.
+ #
+ # defer !condition = $prdr_requested
+ # condition = ${if > {0}{$recipients_count}}
+ # condition = ${if !eq {$acl_m_content_filter} \
+ # {${lookup PER_RCPT_CONTENT_FILTER}}}
+ # warn !condition = $prdr_requested
+ # condition = ${if > {0}{$recipients_count}}
+ # set acl_m_content_filter = ${lookup PER_RCPT_CONTENT_FILTER}
+ #############################################################################
+
# At this point, the address has passed all the checks that have been
# configured, so we accept it unconditionally.
accept
+# This ACL is used once per recipient, for multi-recipient messages, if
+# we advertised PRDR. It can be used to perform receipient-dependent
+# header- and body- based filtering and rejections.
+# We set a variable to record that PRDR was active used, so that checking
+# in the data ACL can be skipped.
+
+.ifdef _HAVE_PRDR
+acl_check_prdr:
+ warn set acl_m_did_prdr = y
+
+ #############################################################################
+ # do lookup on filtering, with $local_part@$domain, deny on filter match
+ #
+ # deny set acl_m_content_filter = ${lookup PER_RCPT_CONTENT_FILTER}
+ # condition = ...
+ #############################################################################
+
+ accept
+.endif
+
# 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.
# Deny if the message contains an overlong line. Per the standards
# we should never receive one such via SMTP.
#
- deny message = maximum allowed line length is 998 octets, \
+ deny condition = ${if > {$max_received_linelength}{998}}
+ message = maximum allowed line length is 998 octets, \
got $max_received_linelength
- condition = ${if > {$max_received_linelength}{998}}
# Deny if the headers contain badly-formed addresses.
#
- deny !verify = header_syntax
- message = header syntax
- log_message = header syntax ($acl_verify_message)
+ deny !verify = header_syntax
+ message = header syntax
+ log_message = header syntax ($acl_verify_message)
# Deny if the message contains a virus. Before enabling this check, you
# must install a virus scanner and set the av_scanner option above.
# X-Spam_bar: $spam_bar\n\
# X-Spam_report: $spam_report
+ #############################################################################
+ # No more tests if PRDR was actively used.
+ # accept condition = ${if def:acl_m_did_prdr}
+ #
+ # To get here, all message recipients must have identical per-user
+ # content filtering (enforced by RCPT ACL). Do lookup for filter
+ # and deny on match.
+ #
+ # deny set acl_m_content_filter = ${lookup PER_RCPT_CONTENT_FILTER}
+ # condition = ...
+ #############################################################################
+
+
# Accept the message.
accept
ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
# if ipv6-enabled then instead use:
# ignore_target_hosts = <; 0.0.0.0 ; 127.0.0.0/8 ; ::1
- dnssec_request_domains = *
no_more
# This closes the ROUTER_SMARTHOST ifdef around the choice of routing for
# 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:
driver = smtp
- message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
-.ifdef _HAVE_DANE
- dnssec_request_domains = *
- hosts_try_dane = *
+.ifdef _HAVE_TLS_RESUME
+ tls_resumption_hosts = *
.endif
smarthost_smtp:
driver = smtp
- message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
multi_domain
#
.ifdef _HAVE_TLS
.ifdef _HAVE_GNUTLS
tls_require_ciphers = SECURE192:-VERS-SSL3.0:-VERS-TLS1.0:-VERS-TLS1.1
.endif
+.ifdef _HAVE_TLS_RESUME
+ tls_resumption_hosts = *
+.endif
.endif
local_delivery:
driver = appendfile
- file = /var/mail/$local_part
+ file = /var/mail/$local_part_data
delivery_date_add
envelope_to_add
return_path_add