Sieve Email Filtering: MIME Part Tests, Iteration, Extraction, Replacement, and Enclosure
RFC 5703
Network Working Group T. Hansen
Request for Comments: 5703 AT&T Laboratories
Category: Standards Track C. Daboo
Apple Inc.
October 2009
Sieve Email Filtering: MIME Part Tests, Iteration, Extraction,
Replacement, and Enclosure
Abstract
This document defines extensions to the Sieve email filtering
language to permit analysis and manipulation of the MIME body parts
of an email message.
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.
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Hansen & Daboo Standards Track [Page 1]
RFC 5703 Sieve MIME Operations October 2009
outside the IETF Standards Process, and derivative works of it may
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.
Table of Contents
1. Introduction ....................................................2
2. Conventions Used in This Document ...............................3
3. Sieve Loops: Actions "foreverypart" and "break" .................3
4. Changes to Sieve Tests ..........................................4
4.1. Test "header" ..............................................4
4.2. Test "address" .............................................7
4.3. Test "exists" ..............................................8
5. Action "replace" ................................................8
6. Action "enclose" ...............................................10
7. Action "extracttext" ...........................................11
8. Sieve Capability Strings .......................................11
9. Examples .......................................................12
9.1. Example 1 .................................................12
9.2. Example 2 .................................................12
9.3. Example 3 .................................................13
10. Acknowledgements ..............................................13
11. Security Considerations .......................................14
12. IANA Considerations ...........................................14
12.1. foreverypart capability ..................................15
12.2. mime capability ..........................................15
12.3. replace capability .......................................15
12.4. enclose capability .......................................16
12.5. extracttext capability ...................................16
13. References ....................................................16
13.1. Normative References .....................................16
13.2. Informative References ...................................17
1. Introduction
MIME messages ([RFC2045]) are often complex objects, consisting of
many parts and sub-parts. This Sieve ([RFC5228]) extension defines
mechanisms for performing tests on MIME body parts, looping through
the MIME body parts, extracting information from a MIME body part,
changing the contents of a MIME body part, and enclosing the entire
message within a wrapper.
Hansen & Daboo Standards Track [Page 2]
RFC 5703 Sieve MIME Operations October 2009
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