Calypso Mail is the latest commercial mail client to go head to head with the likes of Eudora Pro, Pegasus Mail, Netscape Messenger, and Internet Explorer's Outlook Express. Calypso offers quite an impressive feature set coupled with a graphically appealing interface. Considering the fact that it is a relatively new program, Calypso's future looks bright indeed. Calypso's current area of excellence is its support for multiple mail accounts. Managing more than one account has never been easier thanks to features like secure multi-user operation with password control, multiple mailboxes (for sorting incoming and outgoing mail), mail filters, auto-response capabilities, and excellent usability design. Another area that helps set Calypso apart from the competition is its address book capabilities. In addition to the normal capabilities, Calypso offers two additional address book options -- Bulk Mail and Mail Templates. Bulk Mail allows you to easily send the same message to a group of people at the same time. The Mail Template option assists you when sending out routine mailings by utilizing user-configurable templates. Additional cool features include an integrated spelling checker, IMAP4 support (a feature shared by only a few other mail clients, including Netscape Messenger), a three-pane viewing window (similar to Outlook Express), extensive mail filtering options (although not as advanced as Pegasus Mail's), support for multiple signatures, incoming message notification alerts, multiple message sorting options, efficient attachment capabilities, and more. While Calypso does have auto-responder capabilities, the client is set up so that you can only send the same response to all messages received for your account. While this works just fine in many cases, it is not as flexible as the auto-response capabilities found in Pegasus Mail and Transoft Mail, both of which allow you to restrict automatic responses to only be sent out when specific conditions are met. Calypso users will enjoy its multi-threading capabilities, a feature that gives the client an advantage over apps like Eudora Pro, which tend to be slower as a result of their less advanced designs. At just under $60, Calypso competes well with the commercial clients in its category (Eudora Pro, Transoft Mail Control, and Pronto 97), but it doesn't fare as well against less expensive clients like Pegasus Mail, Netscape Messenger, and Outlook Express. Calypso does offer a lite version which kicks in after the thirty day evaluation has expired, but this version is a severely crippled client when compared to the standard release. Calypso Lite restricts you to one mail box, one e-mail account, one signature, no IMAP4 support, no mail filters, no address templates, no Bulk Mail, no spell check, and no auto-response capabilities. The thought of using Calypso Lite on a regular basis should be enough of an incentive to fork over that registration fee well before the expiration date arrives. Overall, Calypso Mail is a near superb client that will only get better with time. Still, for many users with multiple accounts, the current version of Calypso Mail will more than likely meet all of your needs without leaving you wanting for more. Pros: Great interface and usability features, excellent support for multiple mail accounts, solid feature set Cons: Lacks some of the more advanced features found in clients like Pegasus Mail, relatively expensive For more information on Calypso Mail, check out: http://cws.internet.com/32mail.html#calypso