Message Submission for Mail
RFC 4409, “Message Submission for Mail”, is a Draft Standard document published in April 2006 by R. Gellens, J. Klensin. It obsoletes RFC 2476. It has been obsoleted by RFC 6409 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This memo splits message submission from message relay, allowing each service to operate according to its own rules (for security, policy, etc.), and specifies what actions are to be taken by a submission server.
Message relay and final delivery are unaffected, and continue to use SMTP over port 25.
When conforming to this document, message submission uses the protocol specified here, normally over port 587.
This separation of function offers a number of benefits, including the ability to apply specific security or policy requirements. [STANDARDS-TRACK]
What “Draft Standard” means
A historical maturity level (retired in 2011) that sat between Proposed Standard and Internet Standard and required multiple interoperable implementations.
The canonical text of RFC 4409 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 4408 Sender Policy Framework for Authorizing Use of Domains in E-Mail, Version 1
- RFC 4410 Selectively Reliable Multicast Protocol
- RFC 4407 Purported Responsible Address in E-Mail Messages
- RFC 4411 Extending the Session Initiation Protocol Reason Header for Preemption Events
- RFC 4406 Sender ID: Authenticating E-Mail
- RFC 4412 Communications Resource Priority for the Session Initiation Protocol
- RFC 4405 SMTP Service Extension for Indicating the Responsible Submitter of an E-Mail Message
- RFC 4413 TCP/IP Field Behavior