Which IMAP and POP3 servers ?

[Brendan J Simon <brendan.simon@ctam.com.au>]

I need to install some IMAP and POP3 servers so users can read mail via
Netscape/Outlook on other machines.  I have exim as my mail server.  I'm
running Debian Potato on a PowerMac G4.

The choice (according to "apt-get -s install imap-server") of available
imap servers is:
  imap 4.7c-1
  courier-imap 0.31-1

The choice (according to "apt-get -s install pop3-server") of available
pop3 servers is:
  cucipop 1.31-13
  qpopper 2.53-5
  ipopd 4.7c-1

Does anyone have any preferences, suggestions or comments regarding
these packages.  I thought I would install "imap" and "ipopd".  Are
these ok or are there better packages ?  qpopper sounds interesting.

Thanks for any advice,
Brendan Simon.