[Dovecot] Manage sieve scripts in squirrelmail

[Alex]

>Do you know a tool in squirrelmail (or a plugin) for manage sieve scripts?
>Or, how permit to my users to create/modify their filter rules?
>

I must have managesieve daemon on the server side ( look for approriate
info in wiki.dovecot.org. And on squirrelmail side you can use avelsieve.
I wonder, how you could not find it:

http://www.squirrelmail.org/plugin_view.php?id=73
http://email.uoa.gr/projects/squirrelmail/avelsieve.php