I very highly recommend Tuffmail. IMAP email hosting is their business. They focus on that one thing and do it very well. The tech support is extremely knowledgeable and capable. And their pricing is very reasonable. http://www.tuffmail.com/[^] They also support POP3, of course, though I can't imagine why anyone would want that if they can have IMAP. And they don't use a low-end IMAP server, either - they use Cyrus (from CMU) which not only provides SIEVE server-side mail filtering/sorting (awesome) but also scales VERY well. It performs just as well with a 29,000-message Inbox as it does with 100 messages: fast. (Try that with Courier or UW-Imap! This is why I used Cyrus when I was in the web hosting biz.) I have no association or affiliation with them except as a very satisfied customer, and get no kickback for referrals.