1 example.com:
2 	# Indentation is optional, but improves legibility.
3 	# The following defines the user op@example.com;
4 	# <hash> is the hash of the password computed
5 	# with `smtpctl encrypt`
6 	user op <hash>
7 	# and define an arbitrary number of aliases
8 	alias service1
9 	alias other-alias
10 
11 	user otheruser <hash>
12 
13 	# aliases can be to virtual users on other hosts
14 	alias abuse	someone@example2.com
15 
16 example2.com:
17 	user someone <hash>
18 	# …