Chris Hills: [ Charset ISO-8859-1 unsupported, converting... ] > Hi > > The situation is thus:- > > I wish to provide a v6-to-v4 relay for two different domains using the > same postfix process. Mail for the domains is hosted by google, so the > destination host will be ASPMX.L.GOOGLE.com. for both domains. However, > recently my ipv4 provider has blocked outgoing tcp:25 so now I must use > tcp:587 using TLS and authentication. The problem is that I need to use > two different credentials depending upon the domain for which the > message is being relayed. > > i.e. > > u...@domain1.example.com -> postfix -> ASPMX.L.GOOGLE.com. (user: domain1) > u...@domain2.example.com -> postfix -> ASPMX.L.GOOGLE.com. (user: domain2) > > How do I configure this?
Two solutions: 1) Use separate Postfix MTA instances for each domains. See: http://www.postfix.org/MULTI_INSTANCE_README.html 2) Use one Postfix MTA instance with sender-dependent personalities. See: http://www.postfix.org/postconf.5.html#sender_dependent_default_transport_maps and configure mail delivery transports smtp-for-domain1 . . . . . . . smtp -o smtp_tls_foo=xxx.... smtp-for-domain2 . . . . . . . smtp -o smtp_tls_foo=yyy.... overrides in master.cf. See: http://www.postfix.org/master.5.html for master file syntax. Wietse
