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