At Tue, 25 May 2021 12:56:15 -0400 (EDT), pnew...@toosan.com wrote:- >Good afternoon! > >I have set up a postfix/spamassassin (PF/SA) system that is handling mail for >three of my domains enroute to the system that end-users ultimately retrieve >mail from (rackspace). It is working but I had to do it in a convoluted way >that I am not happy about. > >My scenario: > >MX records for (3) domains point to PF/SA system >Mail is processed by PF/SA then destination address is rewritten to a single >4th domain >MX of 4th domain is rackspace, so PF appropriately forwards email to that IP >End-users pick up mail as normal from rackspace > >I would like for my PF/SA system to actually do this without having to do >address rewrite to 4th domain to get it sent on. > >- ONLY accept mail for domains I own (via domain MX record) >- Run accepted email for those domains through SA (I have this working now, >think it is fine) >- Send SA filtered mail on to the rackspace email system. this is where I get >in trouble. I can't set the MX record to both my PF/SA system and rackspace so >I got a 4th domain and set the MX to rackspace and rewrite all outgoing >messages to that domain.)
This can be achieved by relaying the email and using:- transport_maps = hash:/etc/postfix/transport-domains where transport-domains contains:- domain1.zzz :[hostnameofrackspaceserver] domain2.zzz :[hostnameofrackspaceserver] domain3.zzz :[hostnameofrackspaceserver] The square brackets are important to prevent Postfix trying to lookup the MX records for the Rackspace server; you just want the email relayed to it. >- Bounced messages must NOT be sent to rackspace (eg: rackspace can't be my >relayhost) Your Postfix instance will use normal MX delivery for all messages EXEPT for the 3 domain?.zzz listed above. > >Thanks for any direction you may have! > >Phil Best wishes, Matthew
