mastabog wrote:
If I got you right and you want to simulate a mailling list, then for each mailling list you can create a topic on your forum (phpBB, Invision, etc) for which you subscribe all users, formerly subscribed to the mailing list by using an sql client, (e.g. phpMyAdmin, or the system's sql client).
Users can then (un)subscribe to that topic as they did on a mailing list.
The disadvantage is that you can end up having some pretty long forum topics meaning space on your disk.
He didn't actually mean that. phpBB has a function to make groups called "usergroups", although not a lot of forums make use of it. This forum has one - click on the "Usergroups" link, and you'll see there's one usergroup called "linode-announce", which is basically a mailing list set up in the same way as the original poster said.