would relax host matching rules to a broader network range.
+A lookup expansion is also available. It takes an email
+address as the key and an IP address as the database:
+
+ $lookup (username@domain} spf {ip.ip.ip.ip}}
+
+The lookup will return the same result strings as they can appear in
+$spf_result (pass,fail,softfail,neutral,none,err_perm,err_temp).
+Currently, only IPv4 addresses are supported.
+
+
+
SRS (Sender Rewriting Scheme) Support
--------------------------------------------------------------
DCC Support
--------------------------------------------------------------
+Distributed Checksum Clearinghouse; http://www.rhyolite.com/dcc/
*) Building exim
configure a dmarc_forensic_sender because the default sender address
construction might be inadequate.
- control = dmarc_forensic_enable
+ control = dmarc_enable_forensic
(AGAIN: You can choose not to send these forensic reports by simply
-not putting the dmarc_forensic_enable control line at any point in
+not putting the dmarc_enable_forensic control line at any point in
your exim config. If you don't tell it to send them, it will not
send them.)
deny dmarc_status = reject
!authenticated = *
- message = Message from $domain_used_domain failed sender's DMARC policy, REJECT
+ message = Message from $dmarc_used_domain failed sender's DMARC policy, REJECT
msg:complete after main per message
msg:delivery after transport per recipient
+ msg:rcpt:host:defer after transport per recipient per host
+ msg:rcpt:defer after transport per recipient
msg:host:defer after transport per attempt
msg:fail:delivery after main per recipient
msg:fail:internal after main per recipient
smtp:connect after transport per connection
The expansion is called for all event types, and should use the $event_name
-value to decide when to act. The variable data is a colon-separated
-list, describing an event tree.
+variable to decide when to act. The value of the variable is a colon-separated
+list, defining a position in the tree of possible events; it may be used as
+a list or just matched on as a whole. There will be no whitespace.
+
+New event types may be added in the future.
+
There is an auxilary variable, $event_data, for which the
content is event_dependent:
msg:delivery smtp confirmation mssage
+ msg:rcpt:host:defer error string
+ msg:rcpt:defer error string
msg:host:defer error string
tls:cert verification chain depth
smtp:connect smtp banner
-The msg:host:defer event populates one extra variable, $event_defer_errno.
+The :defer events populate one extra variable, $event_defer_errno.
The following variables are likely to be useful depending on the event type:
An example might look like:
-event_action = ${if = {msg:delivery}{$event_name} \
+event_action = ${if eq {msg:delivery}{$event_name} \
{${lookup pgsql {SELECT * FROM record_Delivery( \
'${quote_pgsql:$sender_address_domain}',\
'${quote_pgsql:${lc:$sender_address_local_part}}', \
The string is expanded when each of the supported events occur
and any side-effects of the expansion will happen.
-Note that for complex operations an ACL expansion can be used.
+
+Note that for complex operations an ACL expansion can be used,
+however due to the multiple contexts the Exim operates in
+a) variables set in events raised from transports will not
+ be visible outside that transport call.
+b) acl_m variables in a server context are lost on a new connection,
+ and after helo/ehlo/mail/starttls/rset commands
+
The expansion of the event_action option should normally
Known issues:
- the tls:cert event is only called for the cert chain elements
received over the wire, with GnuTLS. OpenSSL gives the entire
- chain including thse loaded locally.
+ chain including those loaded locally.
Redis Lookup
221 mail.example.net closing connection
-DSN Support
---------------------------------------------------------------
-
-DSN Support tries to add RFC 3461 support to Exim. It adds support for
-*) the additional parameters for MAIL FROM and RCPT TO
-*) RFC complient MIME DSN messages for all of
- success, failure and delay notifications
-*) dsn_advertise_hosts main option to select which hosts are able
- to use the extension
-*) dsn_lasthop router switch to end DSN processing
-
-In case of failure reports this means that the last three parts, the message body
-intro, size info and final text, of the defined template are ignored since there is no
-logical place to put them in the MIME message.
-
-All the other changes are made without changing any defaults
-
-Building exim:
---------------
-
-Define
-EXPERIMENTAL_DSN=YES
-in your Local/Makefile.
-
-Configuration:
---------------
-All DSNs are sent in MIME format if you built exim with EXPERIMENTAL_DSN=YES
-No option needed to activate it, and no way to turn it off.
-
-Failure and delay DSNs are triggered as usual except a sender used NOTIFY=...
-to prevent them.
-Support for Success DSNs is added and activated by NOTIFY=SUCCESS by clients.
-Add
-dsn_advertise_hosts = *
-or a more restrictive host_list to announce DSN in EHLO answers
-
-Those hosts can then use NOTIFY,ENVID,RET,ORCPT options.
-
-If a message is relayed to a DSN aware host without changing the envelope
-recipient the options are passed along and no success DSN is generated.
-
-A redirect router will always trigger a success DSN if requested and the DSN
-options are not passed any further.
-
-A success DSN always contains the recipient address as submitted by the
-client as required by RFC. Rewritten addresses are never exposed.
-
-If you used DSN patch up to 1.3 before remove all "dsn_process" switches from
-your routers since you don't need them anymore. There is no way to "gag"
-success DSNs anymore. Announcing DSN means answering as requested.
-
-You can prevent Exim from passing DSN options along to other DSN aware hosts by defining
-dsn_lasthop
-in a router. Exim will then send the success DSN himself if requested as if
-the next hop does not support DSN.
-Adding it to a redirect router makes no difference.
-
-
-
-
-Certificate name checking
---------------------------------------------------------------
-The X509 certificates used for TLS are supposed be verified
-that they are owned by the expected host. The coding of TLS
-support to date has not made these checks.
+SOCKS
+------------------------------------------------------------
+Support for proxying outbound SMTP via a Socks 5 proxy
+(RFC 1928) is included if Exim is compiled with
+EXPERIMENTAL_SOCKS defined.
-If built with EXPERIMENTAL_CERTNAMES defined, code is
-included to do so for server certificates, and a new smtp transport option
-"tls_verify_cert_hostnames" supported which takes a list of
-names for which the additional checks must be made.
-The option currently defaults to empty, but this may change in
-the future. "*" is probably a suitable value.
-Whether certificate verification is done at all, and the result of
-it failing, is stll under the control of "tls_verify_hosts" nad
-"tls_try_verify_hosts".
+If an smtp transport has a nonempty socks_proxy option
+defined, this is active. The option is expanded and
+should be a list (colon-separated by default) of
+proxy specifiers. Each proxy specifier is a list
+(space-separated by default) where the initial element
+is an IP address and any subsequent elements are options.
-Both Subject and Subject-Alternate-Name certificate fields
-are supported, as are wildcard certificates (limited to
-a single wildcard being the initial component of a 3-or-more
-component FQDN).
+Options are a string <name>=<value>.
+These options are currently defined:
+- "auth", with possible values "none" and "name".
+ Using "name" selects username/password authentication
+ per RFC 1929. Default is "none".
+- "name" sets the authentication username. Default is empty.
+- "pass" sets the authentication password. Default is empty.
+- "port" sets the tcp port number for the proxy. Default is 1080.
+- "tmo" sets a connection timeout in seconds for this proxy. Default is 5.
-The equivalent check on the server for client certificates is not
-implemented. At least one major email provider is using a client
-certificate which fails this check. They do not retry either without
-hte client certificate or in clear.
+Proxies from the list are tried in order until
+one responds. The timeout for the overall connection
+applies to the set of proxied attempts.
-It is possible to duplicate the effect of this checking by
-creative use of Events.
+If events are used, the remote IP/port during a
+tcp:connect event will be that of the proxy.
A TLSA lookup will be done if either of the above options match
and the host-lookup succeded using dnssec.
-If the TLSA lookup succeeds, a TLS connection will be required
-for the host.
+If a TLSA lookup is done and succeeds, a DANE-verified TLS connection
+will be required for the host.
(TODO: specify when fallback happens vs. when the host is not used)
-If dane is in use the following transport options are ignored:
+If DANE is requested and useable (see above) the following transport
+options are ignored:
hosts_require_tls
tls_verify_hosts
tls_try_verify_hosts
tls_crl
tls_verify_cert_hostnames
+If DANE is not usable, whether requested or not, and CA-anchored
+verification evaluation is wanted, the above variables should be set
+appropriately.
+
Currently dnssec_request_domains must be active (need to think about that)
and dnssec_require_domains is ignored.
$tls_out_tlsa_usage (detailed above).
+
+INTERNATIONAL
+------------------------------------------------------------
+SMTPUTF8
+Internationalised mail name handling.
+RFCs 6530, 6533, 5890
+
+Compile with EXPERIMENTAL_INTERNATIONAL and libidn.
+
+New main config option smtputf8_advertise_hosts, default '*',
+a host list. If this matches the sending host and
+accept_8bitmime is true (the default) then the ESMTP option
+SMTPUTF8 will be advertised.
+
+If the sender specifies the SMTPUTF8 option on a MAIL command
+international handling for the message is enabled and
+the expansion variable $message_smtputf8 will have value TRUE.
+
+The option allow_utf8_domains is set to true for this
+message. All DNS lookups are converted to a-label form
+whatever the setting of allow_utf8_domains.
+
+Both localparts and domain are maintained as the original
+utf8 form internally; any matching or regex use will
+require appropriate care. Filenames created, eg. by
+the appendfile transport, will have utf8 name.
+
+Helo names sent by the smtp transport will have any utf8
+components expanded to a-label form.
+
+Any certificate name checks will be done using the a-label
+form of the name.
+
+Log lines and Received-by: header lines will aquire a "utf8"
+prefix on the protocol element, eg. utf8esmtp.
+
+New expansion operators:
+ ${utf8_domain_to_alabel:str}
+ ${utf8_domain_from_alabel:str}
+ ${utf8_localpart_to_alabel:str}
+ ${utf8_localpart_from_alabel:str}
+
+New "control = utf8_downconvert" ACL modifier,
+sets a flag requiring that addresses are converted to
+a-label form before smtp delivery, for use in a
+Message Submission Agent context. Can also be
+phrased as "control = utf8_downconvert/1" and is
+mandatory. The flag defaults to zero and can be cleared
+by "control = utf8_downconvert/0". The value "-1"
+may also be used, to use a-label for only if the
+destination host does not support SMTPUTF8.
+
+If mua_wrapper is set, the utf8_downconvert control
+defaults to -1 (convert if needed).
+
+
+There is no explicit support for VRFY and EXPN.
+Configurations supporting these should inspect
+$smtp_command_argument for an SMTPUTF8 argument.
+
+There is no support for LMTP on Unix sockets.
+Using the "lmtp" protocol option on an smtp transport,
+for LMTP over TCP, should work as expected.
+
+Known issues:
+ - DSN unitext handling is not present
+ - no provision for converting logging from or to UTF-8
+
+----
+IMAP folder names
+
+New expansion operator:
+
+${imapfolder {<string>} {<sep>} {<specials>}}
+
+The string is converted from the charset specified by the headers charset
+command (in a filter file) or headers_charset global option, to the
+modified UTF-7 encoding specified by RFC 2060, with the following
+exception: All occurences of <sep> (which has to be a single character)
+are replaced with periods ("."), and all periods and slashes that aren't
+<sep> and are not in the <specials> string are BASE64 encoded.
+
+The third argument can be omitted, defaulting to an empty string.
+The second argument can be omitted, defaulting to "/".
+
+This is the encoding used by Courier for Maildir names on disk, and followed
+by many other IMAP servers.
+
+ Example 1: ${imapfolder {Foo/Bar}} yields "Foo.Bar".
+ Example 2: ${imapfolder {Foo/Bar}{.}{/}} yields "Foo&AC8-Bar".
+ Example 3: ${imapfolder {Räksmörgås}} yields "R&AOQ-ksm&APY-rg&AOU-s".
+
+Note that the source charset setting is vital, and also that characters
+must be representable in UTF-16.
+
+
+
+DSN extra information
+---------------------
+If compiled with EXPERIMENTAL_DSN_INFO extra information will be added
+to DSN fail messages ("bounces"), when available. The intent is to aid
+tracing of specific failing messages, when presented with a "bounce"
+complaint and needing to search logs.
+
+
+The remote MTA IP address, with port number if nonstandard.
+Example:
+ Remote-MTA: X-ip; [127.0.0.1]:587
+Rationale:
+ Several addresses may correspond to the (already available)
+ dns name for the remote MTA.
+
+The remote MTA connect-time greeting.
+Example:
+ X-Remote-MTA-smtp-greeting: X-str; 220 the.local.host.name ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
+Rationale:
+ This string sometimes presents the remote MTA's idea of its
+ own name, and sometimes identifies the MTA software.
+
+The remote MTA response to HELO or EHLO.
+Example:
+ X-Remote-MTA-helo-response: X-str; 250-the.local.host.name Hello localhost [127.0.0.1]
+Limitations:
+ Only the first line of a multiline response is recorded.
+Rationale:
+ This string sometimes presents the remote MTA's view of
+ the peer IP connecting to it.
+
+The reporting MTA detailed diagnostic.
+Example:
+ X-Exim-Diagnostic: X-str; SMTP error from remote mail server after RCPT TO:<d3@myhost.test.ex>: 550 hard error
+Rationale:
+ This string somtimes give extra information over the
+ existing (already available) Diagnostic-Code field.
+
+
+Note that non-RFC-documented field names and data types are used.
+
+
+
+
--------------------------------------------------------------
End of file
--------------------------------------------------------------
git://git.exim.org / users / jgh / exim.git / blobdiff