search for: how_to_reach_the_mx

Given the following: mailboxes: user1 at example1.com user2 at example1.com user3 at example1.com etc. aliases: whatever at example1.com -> user1 at example1.com whatever at example2.com -> user1 at example1.com whatever at example3.com -> user1 at example1.com Now the problem: example1.com MX goes elsewhere (doesn't point to this server anymore). Domains example2.com and

...here. And the config to make *dovecot* work as needed would need to pick up from there. If we're talking postfix, my first idea would be to make example1.com a virtual alias domain and set up a transport table with entries user1 at example1.com local: # ... etc. etc. ... example1.com smtp:$HOW_TO_REACH_THE_MX (with $HOW_TO_REACH_THE_MX being anything from "use the official MX from DNS" to "contact this internal IP on this port, *without* DNS lookups", whichever your (internal?) networking necessitates). http://www.postfix.org/transport.5.html With a bit of luck, that might already...