Post Office Protocol/Bibliography

RFC-1939, STD-53 (1996), "Post Office Protocol - Version 3", J. Myers, M. Rose, http://tools.ietf.org/html/rfc1939. IETF Standard. POP3, the most common protocol used by mail clients to access a mailstore.

RFC-3501 (2003), "Internet Message Access Protocol - Version 4rev1", M. Crispin, http://tools.ietf.org/html/rfc3501. IETF Standards Track. An access protocol more versatile than POP3, allowing messages to be organized and kept at the mailstore.