Docs: smtp_printf() in the local_scan API

[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 2b77d264733ca7c7c40862ec831e0e9f323ff7f3..5193f1729118f490311654d66a7fed87dc03a473 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -312,6 +312,35 @@ EXPERIMENTAL_SRS=yes
 
 in your Local/Makefile.
 
+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
@@ -542,6 +571,9 @@ ARC support
 Specification: https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-11
 Note that this is not an RFC yet, so may change.
 
+[RFC 8617 was published 2019/06.  Draft 11 was 2018/01.  A review of the
+changes has not yet been done]
+
 ARC is intended to support the utility of SPF and DKIM in the presence of
 intermediaries in the transmission path - forwarders and mailinglists -
 by establishing a cryptographically-signed chain in headers.
@@ -550,10 +582,18 @@ Normally one would only bother doing ARC-signing when functioning as
 an intermediary.  One might do verify for local destinations.
 
 ARC uses the notion of a "ADministrative Management Domain" (ADMD).
-Described in RFC 5598 (section 2.3), this is essentially the set of
-mail-handling systems that the mail transits.  A label should be chosen to
-identify the ADMD.  Messages should be ARC-verified on entry to the ADMD,
-and ARC-signed on exit from it.
+Described in RFC 5598 (section 2.3), this is essentially a set of
+mail-handling systems that mail transits that are all under the control
+of one organisation.  A label should be chosen to identify the ADMD.
+Messages should be ARC-verified on entry to the ADMD, and ARC-signed on exit
+from it.
+
+
+Building with ARC Support
+--
+Enable using EXPERIMENTAL_ARC=yes in your Local/Makefile.
+You must also have DKIM present (not disabled), and you very likely
+want to have SPF enabled.
 
 
 Verification