> > > > If you want to choose transport based on sender, you probably want > > "sender_dependent_default_transport_maps" > > > > > http://www.postfix.org/postconf.5.html#sender_dependent_default_transport_maps > > > > It seems that this option doesn't support wildcards. It says >The tables are searched by the envelope sender address and @domain.
So, I set "discard" as default transport, and did one exception with this option. main.cf: sender_dependent_default_transport_maps = hash:/etc/postfix/map default_transport=discard map: @example.org smtp Sending mail from "example.org" $ swaks --to u...@example.net --from r...@example.org -4 --server 127.0.0.1 Goes to SMTP: postfix/smtp[4156]: 62D4D9F81D: to=<u...@example.net>, relay=none, delay=0.04, delays=0.01/0.01/0.03/0, dsn=5.1.0, status=bounced (Domain example.net does not accept mail (nullMX)) Sending mail from "example.net" $ swaks --to u...@example.net --from r...@example.net -4 --server 127.0.0.1 Discard: postfix/discard[4162]: 2209D9F81D: to=<u...@example.net>, relay=none, delay=0.01, delays=0.01/0/0/0, dsn=2.0.0, status=sent (example.net)
