Need help setting up Postfix for a unique use case
Lemmie start by saying that I'm proficient with SMTP but completely clueless with postfix. Perhaps this is an easy thing to do.
I have multiple domains:
I'd like to setup my centos box so that it's a backup MX gateway for domaina:
Internet email addressed to email@example.com >> postfix gateway >> static route pointing to primary MX host for domaina.com.
I'd like to setup the same centos box so that it hosts all inbound mail for domainb:
Internet message for firstname.lastname@example.org >> postfix gateway >> stored locally
I'd like to setup the same centos box so that it forwards all mail for domainc to an external address:
Internet message for email@example.com >> postfix gateway >> redirects to firstname.lastname@example.org
Is this possible? If so, how is this done? I have postfix installed with TLS support (as per falko's awesome perfect server setup). ISPConfig is NOT installed.