rfc977.txt NNTP
rfc1939.txt POP3
rfc2045.txt MIME 1
rfc2046.txt MIME 2
rfc2047.txt MIME 3
rfc2048.txt MIME 4
rfc2049.txt MIME 5
rfc2183.txt The Content-Disposition Header Field
rfc2342.txt IMAP4 Namespace
rfc2359.txt IMAP4 UIDPLUS extension
rfc2487.txt SMTP Service Extension for Secure SMTP over TLS
rfc2554.txt SMTP Service Extension for Authentication
rfc2683.txt IMAP4 Implementation Recommendations
rfc2821.txt SMTP
rfc2822.txt Internet Message Format
rfc2980.txt Common NNTP Extensions
rfc3156.txt MIME Security with OpenPGP
rfc3501.txt INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1
rfc5804.txt A Protocol for Remotely Managing Sieve Scripts
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