[exim] Newbie Question about Webmail

Hi folks,

This is an unusual question - how to configure a mail server to ONLY do
webmail?

I need some help thinking about this - Pop and IMAP handle incoming mail
for MUA and SMTP handles outgoing mail from a MUA. However, what are the
parts when all-z you want to do is webmail? So, my users will send and
receive all mail via web.

Mehma