RFC

====== RFC documents related to mail and considered during development ======

RFC 1123 - Requirements for Internet Hosts -- Application and Support
RFC 1939 - Post Office Protocol - Version 3
RFC 2034 - SMTP Service Extension for Returning Enhanced Error Codes
RFC 2045 - Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
RFC 2046 - Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types
RFC 2047 - MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text
RFC 2076 - Common Internet Message Headers
RFC 2231 - MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and Continuations
RFC 2369 - The Use of URLs as Meta-Syntax for Core Mail List Commands and their Transport through Message Header Fields
RFC 2449 - POP3 Extension Mechanism
RFC 2595 - Using TLS with IMAP, POP3 and ACAP
RFC 2919 - List-Id: A Structured Field and Namespace for the Identification of Mailing Lists
RFC 3461 - Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs)
RFC 3463 - Enhanced Mail System Status Codes
RFC 3464 - An Extensible Message Format for Delivery Status Notifications
RFC 5321 - Simple Mail Transfer Protocol
RFC 5322 - Internet Message Format
RFC 5336* - SMTP Extension for Internationalized Email Addresses
RFC 5598 - Internet Mail Architecture
RFC 6376 - DomainKeys Identified Mail (DKIM) Signatures
RFC 6377 - DomainKeys Identified Mail (DKIM) and Mailing Lists
RFC 6854 - Update to Internet Message Format to Allow Group Syntax in the "From:" and "Sender:" Header Fields
RFC 7489 INFORMATIONAL - Domain-based Message Authentication, Reporting, and Conformance (DMARC)

* - not implemented at all