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A brief summary of POP3, SMTP, and IMAP, including pointers to sources and frequently-asked-questions sites.
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The user+box@host addressing FAQ. A discussion of what exactly is permissible and verifiable in an e-mail address.
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the Internet Mail Consortium is the only international organization focused on cooperatively managing and promoting the rapidly-expanding world of electronic mail on the Internet.
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comp.mail.mime meta-FAQ: Help for MIME problems. Pointers to information about Multipurpose Internet Mail Extensions and some answers to common problems with MIME.
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Provides background and compares the Post Office Protocol (POP) with the Internet Message Access Protocol (IMAP).
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University of Washington collection of IMAP documentation and resources.