Whether it's the mail server, and you access it via IMAP, or a home-dirs file server, and you access the mail via POP and save it in a mail folder stored in your home dir on the file server, is a design decision for you. Leaving the mail on the mail server and accessing it via IMAP simplifies SA admin a bit - each user can have spamassassin mail folders that sa-learn can easily read, for example.
Oh wow, that's another thing that I didn't think of - spam learning!
With IMAP, I can set up shared mailboxes that people can drop spam into. Duh. Kind of hard to do that with POP.
Hrm, and I can have it set to learn everyone's "Sent" folders as ham. Or.. eh, that might be a bad idea. What do you all think? Auto learn, or feed it a ham corpus?
