Pegasus Mail 4.41 is an excellent client on Windows. It works fine with
both Dovecot IMAP and POP3 (APOP, IMAP LOGIN commands only - no SASL).
Responds to async events. Supports IMAP STARTTLS. Does not use IDLE -
periodic CHECKs. Fast and sensible header caches, light on resources.
Offline mode, but read-only, using cache (prefetch options available if
body caching enabled, it's not by default to save disk space). Searching
is still a bit slow, although it does its best to use IMAP substring
searches when it's possible even though the folder metadata is apparently
managed locally. Excellent configurability; includes semantics for the
different types of separator, prefixes, and a choice of whether or not to
support folders w/ messages or w/o in folders. Moves mails for trash;
only purges from the Trash folder (expunge after every delete operation
and don't provide end-user experience different than local folder
management). Provides several tricks for faster IMAP access, one of which
is to assume only the client is using the mailbox (they can all be turned
off). Closed source. But a very nice client, all round.
http://www.pmail.com/ http://community.pmail.com/
Cheers, Sabahattin
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Sabahattin Gucukoglu