Monday, October 28, 2002 07:08 AM
Go to IMC (The Internet Mail Consortium) and start reading. (they link to relevant RFC's at the IETF (Internet Engineering Task Force).In particular, RFC's most related to POP servers include:
RFC 1939, "Post Office Protocol version 3".
RFC 2449, "POP3 Extension Mechanism" (has some good observations and advice).
RFC 2822 (supercedes old 822), on message format, headers etc.
RFC 2045 etc., MIME specs.
Also www.qpopper.org is the site for free download versions of Qualcomm's Eudora client and QPopper server, which was the ubiquitous standard POP3 server (source code in C) that we all studied and used, back in the early 1990's.