Because when you're on travel, your mail is inaccessible on those PCs, whether at work or at home. With IMAP you can leave mail on server, organize it into folders, search it, etc.
Sure, it the server has to pay for disk, but in a corporate setting, one would pay for disk whether it's on a server or a desktop. A server, hopefully, would be backed up so you should lose mail if you lose a system.
*OR* with IMAP you can download messages and delete them from the server just like with POP. I've always felt that IMAP just makes up for the deficiencies in POP -- it allows all the same activities, as well as so much more.
-- Adam Hooper [EMAIL PROTECTED]