Hii   all,
is there an open  source mail server...or a nice mail client ...
Current  State.
  1. Using Microsoft  Outlook for  client...but  the pst file  has become very heavy  approx 6gb..max should be 2gb  from the literature.
  2. Old  emails are needed for reference purpose as old as 4 yrs old in some cases hence  the size  both in and out.
  3. the heavy pst file sometimes  makes the Microsoft outlook to freeze

Solution needed.
  1. A  mail client that   can import and handle the  heavy pst file.
OR
A  mail server  opensource..that  provides imap services so that one can access sent items on the server.

Any suggestins

rgds

Chege