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[exim.git] / doc / doc-txt / experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 68366a4a944bcf5f15d7f241b6b51a45af8b4ddf..aa3a278fd5ec9cbfa6c98e50b2a2d777bfebd21a 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -292,62 +292,6 @@ These four steps are explained in more details below.
 
 
 
 
 
 

-SRS (Sender Rewriting Scheme) Support (using libsrs_alt)
---------------------------------------------------------------
-See also the main docs, for an alternative native support implementation.
-
-Exim can be built with SRS support using Miles  Wilton's
-libsrs_alt library. The current version of the supported
-library is 0.5, there are reports of 1.0 working.
-
-In order to  use SRS, you  must get a  copy of libsrs_alt from
-
-https://opsec.eu/src/srs/
-
-(not the original source, which has disappeared.)
-
-Unpack the tarball, then refer to MTAs/README.EXIM
-to proceed. You need to set
-
-EXPERIMENTAL_SRS_ALT=yes
-
-in your Local/Makefile.
-
-The built-in support, included by SUPPORT_SRS,
-shuold *not* be enabled if you wish to use the libsrs_alt
-version.
-
-The following main-section options become available:
-       srs_config              string
-       srs_hashlength          int
-       srs_hashmin             int
-       srs_maxage              int
-       srs_secrets             string
-       srs_usehash             bool
-       srs_usetimestamp        bool
-
-The redirect router gains these options (all of type string, unset by default):
-       srs
-       srs_alias
-       srs_condition
-       srs_dbinsert
-       srs_dbselect
-
-The following variables become available:
-       $srs_db_address
-       $srs_db_key
-       $srs_orig_recipient
-       $srs_orig_sender
-       $srs_recipient
-       $srs_status
-
-The predefined feature-macro _HAVE_SRS will be present.
-Additional delivery log line elements, tagged with "SRS=" will show the srs sender.    
-For configuration information see https://github.com/Exim/exim/wiki/SRS .
-
-
-
-

 DCC Support
 --------------------------------------------------------------
 Distributed Checksum Clearinghouse; http://www.rhyolite.com/dcc/
 DCC Support
 --------------------------------------------------------------
 Distributed Checksum Clearinghouse; http://www.rhyolite.com/dcc/


@@ -569,7 +513,9 @@ standard header.
   add_header = :at_start:${authresults {<admd-identifier>}}
 
        Note that it would be wise to strip incoming messages of A-R headers
   add_header = :at_start:${authresults {<admd-identifier>}}
 
        Note that it would be wise to strip incoming messages of A-R headers

-       that claim to be from our own <admd-identifier>.
+       that claim to be from our own <admd-identifier>.  Eg:
+
+  remove_header = \N^(?i)Authentication-Results\s*::\s*example.org;\N

 
 There are four new variables:
 
 
 There are four new variables:
 


@@ -666,6 +612,52 @@ and a whitespace-separated port number must be given.
 
 
 
 
 
 

+
+Logging protocol unusual states
+---------------------------------------------------------------
+An extra log_selector, "protocol_detail" has been added in the default build.
+The name may change in future, hence the Experimental status.
+
+Currrently the only effect is to enable logging, under TLS,
+of a TCP RST received directly after a QUIT (in server mode).
+
+Outlook is consistently doing this; not waiting for the SMTP response
+to its QUIT, not properly closing the TLS session and not properly closing
+the TCP connection.  Previously this resulted is an error from SSL_write
+being logged.
+
+
+
+XCLIENT proxy support
+---------------------------------------------------------------
+Per https://www.postfix.org/XCLIENT_README.html
+
+XCLIENT is an ESMTP extension supporting an inbound proxy.
+The only client immplementation known is in Nginx
+(https://nginx.org/en/docs/mail/ngx_mail_proxy_module.html)
+
+If compiled with EXPERIMENTAL_XCLIENT=yes :-
+
+As a server, Exim will advertise XCLIENT support (conditional on a new option
+"hosts_xclient") and service XCLIENT commands with parameters
+  ADDR
+  NAME
+  PORT
+  LOGIN
+  DESTADDR
+  DESTPORT
+A fresh HELO/EHLO is required after a succesful XCLIENT, and the usual
+values are derived from that (making the HELO and PROTO paramemters redundant).
+
+An XCLIENT command must give both ADDR and PORT parameters if no previous
+XCLIENT has succeeded in the SMTP session.
+
+After a success:
+  $proxy_session variable becomes "yes"
+  $proxy_local_address, $proxy_local_port have the proxy "inside" values
+  $proxy_external_address, $proxy_external_port have the proxy "outside" values
+  $sender_host_address, $sender_host_port have the remot client values
+

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