Postfix virtual email
vi /etc/postfix/main.cf virtual_alias_domains = domain1.tld domain2.tld … virtual_alias_maps = hash:/etc/postfix/virtual vi /etc/postfix/virtual (ignore quotes) ‘@domain1.tld user1@externaldomain1.tld’ ‘@domain2.tld user2@externaldomain2.tld’ newaliases postmap /etc/postfix/virtual /etc/init.d/postfix restart
Opened up SMTP port 25 in Shorewall:
vi /etc/shorewall/rules SMTP/ACCEPT net $FW /etc/init.d/shorewall reload