http://www.rfc-editor.org/rfc/rfc1203.txt
RFC 1203: Interactive Mail Access Protocol: Version 3, J. Rice1991-02-01T23:00:00-00:00This RFC suggests a method for workstations to access mail dynamically from a mailbox server ("repository"). The following document is a modified version of RFC 1064, the definition of the IMAP2 protocol. This RFC specifies an Experimental Protocol for the Internet community. It does not specify any standard.