Web Tools & Services

Parsers / Testers

Sieve Tester

Fastmail's Sieve Tester tests the syntax of Sieve scripts and checks what actions a script causes to the provided email message.

Sieve tester can be found at: http://www.fastmail.fm/docs/sieve/sievetest.php

Sieve Parser in PHP (by libsieve-php)

The libsieve-php open-source project provides a basic online parser for Sieve.

Sieve Parser in Javascript (by Mozilla Sieve Extension)

The Sieve Extension for Mozilla / Thunderbird provides a page with an online parser. It is implemented in Javascript, and located at: