Sieve Mail Fil­ters

How to re-apply Sieve filters to a Dovecot IMAP inbox

using the Pigeonhole sieve-filter tool

Sieve scripts are a great tool to fil­ter incom­ing email mes­sages before they are stored in your mail­box. The Dove­cot IMAP server sup­ports Sieve scripts via the Pigeon­hole plu­gin. How­ever, those scripts are applied to your incom­ing emails before they are deliv­ered to your inbox. Some­times, you may wish to fil­ter mes­sages that are already stored in your mail­box. For instance, when a bug in a Sieve script caused many mes­sages to be deliv­ered incor­rectly. As long as the Sieve…