Postfix

My rimu host hosts a number of domains, including oroup.com, openrelay.com, cadabraco.com and drugmaps.com. I want to be able to send and receive email to those domains, but (at least for now) I don’t really want to set up dovecot locally and actually deal with mail. So the ideal thing is just to forward your mail to another email address. Postfix is a little daunting at first, but the key instructions turn out to be quite simple.

1 /etc/postfix/main.cf:
2     virtual_alias_domains = example.com ...other hosted domains...
3     virtual_alias_maps = hash:/etc/postfix/virtual
4
5 /etc/postfix/virtual:
6     postmaster@example.com postmaster
7     joe@example.com        joe@somewhere
8     jane@example.com       jane@somewhere-else
9     # Uncomment entry below to implement a catch-all address
10     # @example.com         jim@yet-another-site
11     ...virtual aliases for more domains...

Presto, instant email!