All major servers behind-the-firewall as well as Internet email servers are supported:

Microsoft Exchange 5.5 -------------------------------------------------------------------------- Microsoft Exchange 2000 -------------------------------------------------------------------------- Microsoft Exchange 2003 -------------------------------------------------------------------------- Lotus Domino 5.0 -------------------------------------------------------------------------- Lotus Domino 6.0 -------------------------------------------------------------------------- Lotus Domino 6.5 -------------------------------------------------------------------------- Lotus Domino 7.0. -------------------------------------------------------------------------- ISP-hosted POP3 and IMAP4 accounts (also SSL secured servers)