Header field: Message-ID

Message identifier

Applicable protocol:

Mail (http://www.rfc-editor.org/rfc/rfc2822.txt)

Status:

standards-track

Author/Change controller:

IETF (mailto:iesg@ietf.org)
Internet Engineering Task Force.

Specification document(s):

http://www.rfc-editor.org/rfc/rfc2822.txt (section 3.6.4)

Related information:

Contains a single unique message identifier that refers to a particular version of a particular message. If the message is resent without changes, the original Message-ID is retained.