Introduction
Suppose you want all your web servers to locally send all email (maybe from your contact forms, or whatever)
to a real smtp gateway. If you're running
postfix as your mta, this is quite easily to achieve.
Configuration
In your
main.cf file (usually /etc/postfix/main.cf or /usr/local/etc/postfix/main.cf), specify your transport maps:
- transport_maps = hash:/etc/postfix/transport
And in your
transport
file (usually /etc/postfix/transport or
/usr/local/etc/postfix/transport), specify
your gateways per domain. This allows you to specify with regular
expressions which emails go where. In this case, an asterisk specifies
every domain
(the transport file allows very complex setups, this is of course an
extreme and trivial example):
Then invoke postmap to regenerate the transports db, and reload postfix:
- # postmap hash:/etc/postfix/transport
- # postfix reload
That should do it. All email generated in this host should now be
forwarded to the smtp gateway. Remember to configure your smtp gateway
to accept mail from all the hosts that will forward emails to it.
