I have run several dist. of Linux and was wondering if there is any good e-mail clients out there for a corporate network? I am currently running Caldera Open Linux and have tried TradeMail, Kmail (KDE's client) and Postilion (under Debian) I have yet to find a mail client that has the ease of use as Outlook does on an Exchange server. <br>I would like to be able to use Exchange's "Global address list" but it will not work with POP and IMAP.<br>any ideas?