So for a few years I have been running a combination of Qmail, Courier-IMAP and Vmailmgr to allow for multiple virtual domains with many users without having to add each user to the system. I was doing some upgrading last night and I found out that the fine folks over at Courier have changed they way their authdaemon system works so that it is now incompatible with vmailmgr. Here is what they have to say about it:
I can only see the following minuses from losing the non-daemonized configuration. I believe the minuses are greatly outranked by the pluses.
There are some third party configuration libraries that only work in a non-daemonized configuration. I'm aware of one such library, vmailmgr. Unless it's been updated to work in daemonized mode, it will no longer work.
Great! So I just had to downgrade my upgrade of courier-imap. I am going to change my whole system soon and stop using vmailmgr and possible even qmail too. We'll see what happens.