Justin Peters:
> Greetings,
>
> I have several Postfix implementations successfully handling outbound mail
> relay directly to the Internet. These servers handle mail individually;
> one physical server relays for all outbound mail for domainA.com, another
> for domainB.com, etc. All servers have DNS/rDNS set up properly so that
> they may do this.
>
> I would like to consolidate all of these servers into a single Postfix mail
> relay server implementation. There is no need at this time for Postfix to
> listen for any mail, it will purely be used as a mail relay.
>
> The idea would be to have several IP addresses configured on the DMZ-facing
> NIC (10.1.1.0), and several IP addresses configured on the Internet-facing
> NIC (5.5.5.0). Mail originating from domainA.com would be sent to IP
> address 10.1.1.5 on the mail server and thus would be sent to the Internet
> out 5.5.5.5. Mail originating from domainB.com would always be sent to
> 10.1.1.6 and thus would be sent to the Internet out 5.5.5.6. The reason I
> would like it this way is so that outbound mail preserves hostname/domain
> information in headers for each individual company.
>
> Is this possible thru a single instance of Postfix? If so, what areas of
> configuration should I be concentrating on? Or should I be considering
> multiple instances?
Use multiple Postfix instances. Postfix 2.6 makes this really easy.
Wietse
