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Simple Mail Transfer Protocol extension for relaying Metadata

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Alexey Melnikov
Last updated 2015-12-19 (Latest revision 2015-06-17)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This memo defines an extension to the SMTP (Simple Mail Transfer Protocol) service whereby message metadata (such as Trace header fields, IMAP flags, Keying material, etc) can be transferred in separate containers similar to BDAT (RFC 3030, SMTP CHUNKING) command. This allows clean separation of transaction related state from the message itself.


Alexey Melnikov

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)