4.8. IMAP Tuning Specifics
Three popular Open Source IMAP server solutions exist: the University of Washington (UW), Cyrus, and Courier IMAP solutions. Each has its own niche and characteristics that makes it the best choice under certain circumstances. In this document, we will only briefly consider the performance implications of these services, as a truly in-depth analysis would require an extra book. IMAP is a very complicated protocol, much more so than any other aspect of email service, and its intricacies also will not be discussed here in any depth. For an understanding of the issues involved in running an Open Source IMAP server, check out Managing IMAP [MM00].
Generally, IMAP access differs from POP access in several ways. First, IMAP ...
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