rfc2047.txt MIME 3
rfc2048.txt MIME 4
rfc2049.txt MIME 5
-rfc2060.txt IMAP4
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
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