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Code Issues Releases Activity

Add Delivered-To header to received messages

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Postfix, after expanding the alias, is not transmitting the original
envelope recipient email address to dovecot and cannot record it in a
Received: header.

The LMTP DSN extension allows postfix to specify an ORCPT= parameter to
the "RCPT TO:" line (in postfix src/smtp/smtp_proto.c). However, dovecot
does not support the DNS extension on the LMTP endpoint. It has
preliminary support of the ORCPT parameter in latest versions but is is
disabled and not working.

The solution taken was to add a sieve script to parse the Received:
header written by postfix and parse the original RCPT TO address from
it. Then add the header through the "editheader" sieve extension. Later
sieve scripts can take this header to perform further filtering.
This commit is contained in:
Mildred Ki'Lya 2018-04-03 21:12:08 +01:00
parent 52bad80af8
commit 649a4fc9cf
2 changed files with 9 additions and 1 deletions
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2
core/dovecot/conf/dovecot.conf
View File

@ -138,7 +138,7 @@ service managesieve {
plugin {
sieve = file:~/sieve;active=~/.dovecot.sieve
sieve_plugins = sieve_extdata sieve_imapsieve sieve_extprograms
sieve_global_extensions = +vnd.dovecot.extdata +spamtest +spamtestplus +vnd.dovecot.execute
sieve_global_extensions = +vnd.dovecot.extdata +spamtest +spamtestplus +vnd.dovecot.execute +editheader
sieve_before = /var/lib/dovecot/before.sieve
sieve_default = /var/lib/dovecot/default.sieve
sieve_after = /var/lib/dovecot/after.sieve

8
core/dovecot/sieve/before.sieve
View File

@ -11,6 +11,14 @@ require "comparator-i;ascii-numeric";
require "vnd.dovecot.extdata";
require "vnd.dovecot.execute";
require "spamtestplus";
require "editheader";
require "index";
if header :index 2 :matches "Received" "from * by * for <*>; *"
{
deleteheader "Delivered-To";
addheader "Delivered-To" "<${3}>";
}
if allof (string :is "${extdata.spam_enabled}" "1",
spamtest :percent :value "gt" :comparator "i;ascii-numeric" "${extdata.spam_threshold}")