POP/IMAP server - more NEWBIE

[Stephen Froehlich]

OK, I'd like to also gather some opinions on how best to implement POP
and/or IMAP.

Here are my requirements:

In the immediate present, I just need to allow the local network to access.
In the near future, I'll need to allow encrypted remote access.  (Encrypted
only.)  I have a few, relatively trusted users.  How would you go about
meeting those requirements?