Useful email RFC's

RFC description status RFC 1939 POP3 protocol Updated by RFC 2449 RFC 2449 POP3 Extension Mechanism   RFC 822 STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES Obsoleted by RFC 2822 RFC 2822 Internet Message Format   RFC 2045 MIME Part One: Format of Internet Message Bodies Updated by RFC 2231 RFC 2046 MIME Part Two: Media Types   RFC 2047 MIME Part Three: Message Header Extensions for Non-ASCII Text Updated by RFC 2231 RFC 2183 The Content-Disposition Header Field Updated by RFC 2231 RFC 2231 MIME Parameter Value and Encoded Word Extensions: Character Sets,...   RFC 2387 The MIME Multipart/Related Content-type   RFC 3462 The MIME Multipart/Report Content-type   RFC 2111 Content-ID and Message-ID Uniform Resource Locators   RFC 2632 S/MIME Version 3 Certificate Handling   RFC 2633 S/MIME Version 3 Message Specification   RFC 2821 Simple Mail Transfer Protocol