Network Working Group C. Daboo
Request for Comments: 5235 January 2008
Obsoletes: 3685
Category: Standards Track

Sieve Email Filtering: Spamtest and Virustest 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.

Abstract

The Sieve email filtering language "spamtest", "spamtestplus", and "virustest" extensions permit users to use simple, portable commands for spam and virus tests on email messages. Each extension provides a new test using matches against numeric "scores". It is the responsibility of the underlying Sieve implementation to do the actual checks that result in proper input to the tests.

Table of Contents

1. Introduction and Overview .......................................2
2. Conventions Used in This Document ...............................2
3. Sieve Extensions ................................................3
3.1. General Considerations .....................................3
3.2. Test spamtest ..............................................3
3.2.1. spamtest without :percent Argument ..................4
3.2.2. spamtest with :percent Argument .....................5
3.3. Test virustest .............................................7
4. Security Considerations .........................................9
5. IANA Considerations .............................................9
5.1. spamtest Registration ......................................9
5.2. virustest Registration ....................................10
5.3. spamtestplus Registration .................................10
6. References .....................................................10
6.1. Normative References ......................................10
6.2. Informative References ....................................11
Appendix A. Acknowledgments .......................................12
Appendix B. Important Changes since RFC 3685 ......................12