Which bundle is better for the mail north?

Question

Mail server

hello, tell me a good bundle for a mail server under Linux
before that I worked with iredmail.
on a new place it is necessary to transfer from windows 2003 mail to any lincus. Forgive me to suggest a suitable bundle of packages for the mail server.

Answer 1

we put iredmail on Linux (it seems to be based on postfix) we
raise the imap service (courier-imap or dovecot)
we create a user base (virtual in mysql)
and imapsync do synchronization from the old to the new