Ah, very good. How do your users create their sieve scripts then? I assume you have some basic ways of creating filters and then more advanced users can create their own scripts? Do your users use Websieve?
Ah, well, err, um, mumble...
At the moment, only users with shell access can install sieve scripts. I'm still checking out various possibilities for mail-only users. Since I have Horde set up with IMP for webmail access; onoe of the things I'll be checking out is Ingo. (Horde filtering interface. To be integrated into the next major version of IMP.)
I'll also be checking out Websieve, Smartsieve, and "damn, none of these do what I want so I'll have to roll my own".
-Pat