Message Submission BURL Extension
RFC 4468
| Document | Type |
RFC - Proposed Standard
(May 2006; Errata)
Updated by RFC 5248
Updates RFC 3463
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4468 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ted Hardie | ||
| Send notices to | (None) | ||
Network Working Group C. Newman
Request for Comments: 4468 Sun Microsystems
Updates: 3463 May 2006
Category: Standards Track
Message Submission BURL Extension
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 Notice
Copyright (C) The Internet Society (2006).
Abstract
The submission profile of Simple Mail Transfer Protocol (SMTP)
provides a standard way for an email client to submit a complete
message for delivery. This specification extends the submission
profile by adding a new BURL command that can be used to fetch
submission data from an Internet Message Access Protocol (IMAP)
server. This permits a mail client to inject content from an IMAP
server into the SMTP infrastructure without downloading it to the
client and uploading it back to the server.
Newman Standards Track [Page 1]
RFC 4468 Message Submission BURL Extension May 2006
Table of Contents
1. Introduction ....................................................2
2. Conventions Used in This Document ...............................2
3. BURL Submission Extension .......................................3
3.1. SMTP Submission Extension Registration .....................3
3.2. BURL Transaction ...........................................3
3.3. The BURL IMAP Options ......................................4
3.4. Examples ...................................................5
3.5. Formal Syntax ..............................................6
4. 8-Bit and Binary ................................................7
5. Updates to RFC 3463 .............................................7
6. Response Codes ..................................................7
7. IANA Considerations .............................................9
8. Security Considerations .........................................9
9. References .....................................................11
9.1. Normative References ......................................11
9.2. Informative References ....................................12
Appendix A. Acknowledgements .....................................13
1. Introduction
This specification defines an extension to the standard Message
Submission [RFC4409] protocol to permit data to be fetched from an
IMAP server at message submission time. This MAY be used in
conjunction with the CHUNKING [RFC3030] mechanism so that chunks of
the message can come from an external IMAP server. This provides the
ability to forward an email message without first downloading it to
the client.
2. Conventions Used in This Document
The key words "MUST", "MUST NOT", "SHOULD", "SHOULD NOT", and "MAY"
in this document are to be interpreted as defined in "Key words for
use in RFCs to Indicate Requirement Levels" [RFC2119].
The formal syntax uses the Augmented Backus-Naur Form (ABNF)
[RFC4234] notation including the core rules defined in Appendix B of
RFC 4234.
Newman Standards Track [Page 2]
RFC 4468 Message Submission BURL Extension May 2006
3. BURL Submission Extension
This section defines the BURL submission extension.
3.1. SMTP Submission Extension Registration
1. The name of this submission extension is "BURL". This extends
the Message Submission protocol on port 587 and MUST NOT be
advertised by a regular SMTP [RFC2821] server on port 25 that
acts as a relay for incoming mail from other SMTP relays.
2. The EHLO keyword value associated with the extension is "BURL".
3. The BURL EHLO keyword will have zero or more arguments. The only
argument defined at this time is the "imap" argument, which MUST
be present in order to use IMAP URLs with BURL. Clients MUST
ignore other arguments after the BURL EHLO keyword unless they
are defined by a subsequent IETF standards track specification.
The arguments that appear after the BURL EHLO keyword may change
subsequent to the use of SMTP AUTH [RFC2554], so a server that
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