imap + mailbox ?

[nemolomen]

Well, please don't take this as preaching, it's nothing like that, only that Maildir is what I have experience with...

I believe Maildir will also fit the bill for all of your needs.

From the Maildir article on Wikipedia :

"Maildir is a widely-used format for storing e-mail that does not require application-level file locking to maintain message integrity as messages are added, moved and deleted. Each message is kept in a separate file with a unique name. All changes are made using atomic filesystem operations so that the filesystem handles file locking concurrency issues. A Maildir is a directory (often named Maildir) with three subdirectories named tmp, new, and cur."

And, from the mutt article on Wikipedia:

"Mutt supports most mail formats (notably both mbox and Maildir) and protocols (POP3, IMAP, etc)."

My setup, from the link I posted above, uses this format and it is stored in the /home/nemolomen/maildir folder.

Just pointing out options you may not know you have.

[cpg]

your point is well taken and appreciated.
i will take a look at the Maildir options.

[unclesamwk]

http://www.axigen.com/mail-server/free/

I thing that is okay?

[rgmhtt]

See http://wiki.amahi.org/index.php/Amahi_Mail_System

We are well along with a full mail solution.

And I am adding Mailman as an additional option to the mix.