HOWTO Setup Postfix
Install Postfix
# emerge postfix -va
Configuration
Configure Postfix; the relevant settings to be tweaked are presented:
/etc/postfix/main.cf
myhostname = zero.iat.sfu.ca
naturally, use your server's real name :-)
mydomain = iat.sfu.ca
sender_canonical_maps = hash:/etc/postfix/sender_canonical
virtual_maps = hash:/etc/postfix/virtual
relayhost = gotta check on this!