postfix smtp relay

ormey2000 · 01-19-2010, 06:52 AM

Hi

I want to run a DMZ postifx smtp relay that will collect and relay several domains, this I can do.

But is it possible to then relay each domain to a different server ?

If so how ? and what set up is needed.

Thanks in advance

Dave_Devnull · 01-19-2010, 07:04 AM

It's possible to set Postfix up as a gateway/relay device accepting mail for multiple domains and relaying them to the final destination server(s). These can be set up in a simple .db map or by using mysql/postgres or even ldap.

You have a bit of learning curve. Start here: http://www.postfix.org/postconf.5.html#relayhost

ormey2000 · 01-19-2010, 07:24 AM

OK so would

in /etc/postfix/transport :
domain1.com :[test.relay.com]
domain2.com :[test2.relay.com]

and in main.cf:
relayhost=
(nothing in relayhost)
transport_map = hash:/etc/postfix/transport

this is to tell postfix that :
all mail domain1.com to is relayed to the server test.relay.com

and all domain2.com mail to is relayed to test2.relay.com....

would that be correct ?