Postfix Cheat Sheet

Table of Contents

Configuring Postfix to use Dovecot’s SASL implementation

The Ubuntu guide, at, makes it easy.

Virtual alias domains

Assuming DNS is properly set up:

First, list domains in the virtual_alias_domains setting in e.g.:

virtual_alias_domains =
virtual_alias_maps = hash:/etc/postfix/virtual

Next, edit the virtual map (/etc/postfix/virtual, in this case) to have the virtual domain address. e.g.:



Then, run postmap to update the map:

$ sudo postmap /etc/postfix/virtual


Using dkim-filter: