Hello, I have a Mailman + postfix setup (old versions: mailman 2.1.11, postfix 2.5.5), and the mail server of one of subscribers' domain started rejecting mails when "From" header domain is its own domain (foo.com MX rejecting incoming @foo.com mails). This of course happens when a @foo.com member posts to the list: other @foo.com subscribers never receive his post.
From my understanding of the "From" header, it is legal for it to have a domain which is not hosted by sender (ie, the SMTP transaction initiator). So my plan is to change nothing on the Mailman level, but rather add an exception in our postfix config to mangle "From" header of mails being sent to that server. In my understanding, I need 2 distinct postfix features: - transport_maps for the "recipient-dependent" aspect - header_check for the mangling part Is my understanding correct so far ? Here is how I implemented the above: main.cf: transport_maps = hash:/etc/postfix/transport_map transport_map: foo.com mangle_from: master.cf: mangle_from unix - - - - - smtpd -o header_checks=pcre:/etc/postfix/mangle_from.pcre mangle_from.pcre: /^From:[[:space:]]+.*@foo.com/ REPLACE From: <nob...@nexedi.com> But this fails between transport_map and master.cf: mail.log: Aug 7 12:56:46 ns208770 postfix/oqmgr[4535]: 2B67ABF017B: from=<vinc...@nexedi.com>, size=5497, nrcpt=1 (queue active) Aug 7 13:01:46 ns208770 postfix/error[22126]: 2B67ABF017B: to=<...@foo.com>, relay=none, delay=1833, delays=1533/300/0/0.16, dsn=4.3.0, status=deferred (mail transport unavailable) mail.warn: Aug 7 13:01:46 ns208770 postfix/oqmgr[4535]: warning: unexpected end-of-input from private/mangle_from socket while reading input attribute name Aug 7 13:01:46 ns208770 postfix/oqmgr[4535]: warning: private/mangle_from socket: malformed response What did I do wrong ? Can I do anything without having to upgrade right now ? Regards, -- Vincent Pelletier ERP5 - open source ERP/CRM for flexible enterprises
smime.p7s
Description: S/MIME cryptographic signature
