Sieve Email Filtering: Reject and Extended Reject Extensions
RFC 5429
| Document | Type |
RFC - Proposed Standard
(March 2009; No errata)
Obsoletes RFC 3028
Updates RFC 5228
|
|
|---|---|---|---|
| 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 5429 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Lisa Dusseault | ||
| Send notices to | (None) | ||
Network Working Group A. Stone, Ed.
Request for Comments: 5429 Serendipity
Obsoletes: 3028 March 2009
Updates: 5228
Category: Standards Track
Sieve Email Filtering: Reject and Extended Reject Extensions
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) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
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Please review these documents carefully, as they describe your rights
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This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
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material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
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not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Abstract
This memo updates the definition of the Sieve mail filtering language
"reject" extension, originally defined in RFC 3028.
A "Joe-job" is a spam run forged to appear as though it came from an
innocent party, who is then generally flooded by automated bounces,
Message Disposition Notifications (MDNs), and personal messages with
Stone Standards Track [Page 1]
RFC 5429 Sieve Extension: Reject March 2009
complaints. The original Sieve "reject" action defined in RFC 3028
required use of MDNs for rejecting messages, thus contributing to the
flood of Joe-job spam to victims of Joe-jobs.
This memo updates the definition of the "reject" action to allow
messages to be refused during the SMTP transaction, and defines the
"ereject" action to require messages to be refused during the SMTP
transaction, if possible.
The "ereject" action is intended to replace the "reject" action
wherever possible. The "ereject" action is similar to "reject", but
will always favor protocol-level message rejection.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Conventions Used in This Document . . . . . . . . . . . . 3
2. Sieve "reject" and "ereject" Extensions . . . . . . . . . . . 4
2.1. Action ereject . . . . . . . . . . . . . . . . . . . . . . 4
2.1.1. Rejecting a Message at the SMTP/LMTP Protocol Level . 5
2.1.2. Rejecting a Message by Sending a DSN . . . . . . . . . 5
2.2. Action reject . . . . . . . . . . . . . . . . . . . . . . 6
2.2.1. Rejecting a Message by Sending an MDN . . . . . . . . 7
2.3. Silent Upgrade from "reject" to "ereject" . . . . . . . . 8
2.4. Compatibility with Other Actions . . . . . . . . . . . . . 9
2.5. Details of Protocol-Level Refusal . . . . . . . . . . . . 9
3. Changes from RFC 3028 . . . . . . . . . . . . . . . . . . . . 11
4. Security Considerations . . . . . . . . . . . . . . . . . . . 11
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
5.1. "reject" Extension Registration . . . . . . . . . . . . . 11
5.2. "ereject" Extension Registration . . . . . . . . . . . . . 12
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1. Normative References . . . . . . . . . . . . . . . . . . . 12
6.2. Informative References . . . . . . . . . . . . . . . . . . 13
Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 14
Appendix B. Contributors . . . . . . . . . . . . . . . . . . . . 14
Stone Standards Track [Page 2]
RFC 5429 Sieve Extension: Reject March 2009
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