extend template, shamelessly stolen from: http://russell.ballestrini.net/postfix-salt-state-formula/
relay for the domain
add inbound iptables rule
have unique names
increas message size limit
Merge pull request #2 from davidkarlsen/master

extension of formula
Merge branch 'master' of github.com:saltstack-formulas/postfix-formula
Make postfix.config state work with latest changes