Directory of RFCs Resources

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• RFC 0821 - Simple Mail Transfer Protocol

  http://tools.ietf.org/html/rfc821
  Describes the widely implemented Simple Mail Transfer Protocol (SMTP) designed to transfer mail reliably and efficiently and relay mail across transport service environments.

• RFC 0822 - Standard for ARPA Internet Text Messages

  http://tools.ietf.org/html/rfc822
  Specifies the syntax for Internet mail text messages.

• RFC 0947 - Mail Routing and the Domain System

  http://tools.ietf.org/html/rfc974
  Describes how mail systems on the Internet are expected to route messages based on information from the domain system.

• RFC 1123 - Requirements for Internet Hosts - Application and Support

  http://tools.ietf.org/html/rfc1123
  Defines and discusses the requirements for Internet host software and covers the application and support protocols.

• RFC 1566 - Mail Monitoring MIB

  http://tools.ietf.org/html/rfc1566
  Defines a portion of the Management Information Base (MIB) for use with network management protocols, and extends the basic Network Services Monitoring MIB to allow monitoring of Message Transfer Agents (MTAs).

• RFC 1869 - SMTP Service Extensions

  http://tools.ietf.org/html/rfc1869
  Defines a framework for extending the SMTP service by defining a means whereby a server can inform a client as to the service extensions it supports.

• RFC 1893 - Enhanced Mail System Status Codes

  http://tools.ietf.org/html/rfc1893
  Describes the Enhanced Mail System Status Codes, a set of status codes for reporting mail system errors and delivery status notifications.

• RFC 1939 - Post Office Protocol - Version 3

  http://tools.ietf.org/html/rfc1939
  Describes the widely implemented Post Office Protocol (POP), which allows a client to retrieve mail that a server is holding for it.

• RFC 2033 - Local Mail Transfer Protocol

  http://tools.ietf.org/html/rfc2033
  Describes the Local Mail Transfer Protocol (LMTP), for transporting mail into a system where a mail receiver does not manage a queue.

• RFC 2045 - Multipurpose Internet Mail Extensions (MIME) - Part 1

  http://tools.ietf.org/html/rfc2045
  Specifies the format of Internet message bodies and the various headers used to describe the structure of MIME messages.

• RFC 2046 - Multipurpose Internet Mail Extensions (MIME) - Part 2

  http://tools.ietf.org/html/rfc2046
  Defines the general structure of the MIME media typing system and defines an initial set of media types.

• RFC 2047 - Multipurpose Internet Mail Extensions (MIME) - Part 3

  http://tools.ietf.org/html/rfc2047
  Describes extensions to RFC 822 to allow non-US-ASCII text data in Internet mail header fields.

• RFC 2048 - Multipurpose Internet Mail Extensions (MIME) - Part 4

  http://tools.ietf.org/html/rfc2048
  Specifies various IANA registration procedures for MIME media types, MIME external body access types, and MIME content-transfer-encodings.

• RFC 2049 - Multipurpose Internet Mail Extensions (MIME) - Part 5

  http://tools.ietf.org/html/rfc2049
  Describes MIME conformance criteria as well as providing some illustrative examples of MIME message formats.

• RFC 2060 - Internet Message Access Protocol - Version 4 Rev 1

  http://tools.ietf.org/html/rfc2060
  Describes the Internet Message Access Protocol (IMAP), which allows a client to access and manipulate electronic mail messages on a server, and permits manipulation of remote message folders.

• RFC 2821 - Simple Mail Transfer Protocol

  http://tools.ietf.org/html/rfc2821
  Describes the widely implemented Simple Mail Transfer Protocol (SMTP) designed to transfer mail reliably and efficiently and relay mail across transport service environments. Obsoletes RFC 821, 974, 1869.

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