SMTP Service Extension for Message Tracking (RFC3885)
Original Publication Date: 2004-Sep-01
Included in the Prior Art Database: 2004-Sep-28
Internet Society Requests For Comment (RFCs)
E. Allman: AUTHOR [+2]
This memo defines an extension to the SMTP service whereby a client may mark a message for future tracking.
Network Working Group E. Allman
Request for Comments: 3885 Sendmail, Inc.
Updates: 3461 T. Hansen
Category: Standards Track AT&T Laboratories
SMTP Service Extension
for Message Tracking
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (2004).
This memo defines an extension to the SMTP service whereby a client
may mark a message for future tracking.
1. Other Documents and Conformance
The model used for Message Tracking is described in [RFC-MTRK-MODEL].
Doing a Message Tracking query is intended as a "last resort"
mechanism. Normally, Delivery Status Notifications (DSNs) [RFC-DSN-
SMTP] and Message Disposition Notifications (MDNs) [RFC-MDN] would
provide the primary delivery status. Only if the message is not
received, or there is no response from either of these mechanisms
should a Message Tracking query be issued.
The definition of the base64 token is imported from section 6.8 of
base64 = %x2b / %x2f / %x30-39 / %x41-5a / %x61-7a
Allman & Hansen Standards Track [Page 1]
RFC 3885 Message Tracking ESMTP Extension September 2004
The definition of the DIGIT token is imported from [RFC-MSGFMT].
DIGIT = %x30-39
Syntax notation in this document conforms to [RFC-ABNF].
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in BCP 14, RFC 2119
2. SMTP Extension Overview
The Message Tracking SMTP service extension uses the SMTP service
extension mechanism described in [RFC-ESMTP]. The following service
extension is hereby defined:
(1) The name of the SMTP service extension is "Message Tracking".
(2) The EHLO keyword value associated with this extension is
(3) No paramete...