→Creating Sieve Filters
*RoundCube - our webmail has a Filters option in the settings - We'd recommend this even if you don't usually use webmail.
*[https://github.com/thsmi/sieve/releases Extension for Thunderbird] (fine for manually editing the script file) '''Important note:''' Use the [https://github.com/thsmi/sieve/releases latest] version
(e.g. version 0.3 or higher ) as the one on the Thunderbird Addons website is old and does not work.
*[https://www.claws-mail.org/plugin.php?plugin=managesieve Extension for claws-mail] (may be packaged as claws-mail-managesieve). Very similar to the Thunderbird extension.
*There are others, take a look at [http://sieve.info/clients sieve.info]. You'd use the same server, username and password that you do to access your email, and use port 4190, and TLS.