I'm migrating email from old Plesk installations to custom built Ubuntu server running iRedMail (postfix/amavisd/dovecot/etc).
I'm using postfixadmin to administrate all domains and a mysql backend. I've noticed that if I want to "alias" something or create a forward, I can not use an existing mailbox - so I can't copy over the Plesk-style "redirect with saved copy" feature.
I'm currently setting remote aliases via a database and using:
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
If there is a way to still use my database it would be ideal - even if I have to add some columns, and change the query.