my postfix server should deliver mail for two domains: domainA.it and
domainA.com (yes, the domain name is the same, but the suffix change).
some site reports that the solution is in "relay_domains =
hash:/etc/postfix/relay_domains" and "transport_maps =
hash:/etc/postfix/transport" parameters in main.cf, using external text
files containing:

/etc/postfix/transport:
domainA.it smtp:x.x.x.x
domainA.com smtp:x.x.x.x

/etc/postfix/relay_domains
domainA.it OK
domainA.com OK

(x.x.x.x is the mailserver on the local network)

can anyone confirm this idea since i have found lots of different
solutions and i don't know which is the better and if this method is
correct.

Thanks,
paolino

Paolino,

Your concept looks okay to me, assuming that your host is acting as a relay
between the outside world and those 2 domain names and systems.

Also take a look at "mynetworks" in: man 5 postconf
You'll probably want make sure those 2 systems are in mynetworks if you
expect them to relay outgoing email via your site.

There's some documentation at http://www.postfix.org/documentation.html
under "SMTP Relay/access control".
--
Greg




paolino@30gigs.com wrote:
> my postfix server should deliver mail for two domains: domainA.it and
> domainA.com (yes, the domain name is the same, but the suffix change).
> some site reports that the solution is in "relay_domains =
> hash:/etc/postfix/relay_domains" and "transport_maps =
> hash:/etc/postfix/transport" parameters in main.cf, using external text
> files containing:
>
> /etc/postfix/transport:
> domainA.it smtp:x.x.x.x
> domainA.com smtp:x.x.x.x
>
> /etc/postfix/relay_domains
> domainA.it OK
> domainA.com OK
>
> (x.x.x.x is the mailserver on the local network)
>
> can anyone confirm this idea since i have found lots of different
> solutions and i don't know which is the better and if this method is
> correct.
>
> Thanks,
> paolino
>

thank you, greg. it works.
the host i was talking about is a relay..

thanks again,
paolino