Roundcube doesn't support filtering, like most clients seem to. The official line seems to be 'it should be done by the server, not the client'.
I like this idea, as I often use multiple clients and it's a pain to set up my filters more than once. However, after spending some time googling, I'm having trouble coming up with a solution that does what I want.
I run a vpopmail/qmail/courier-imap environment, hosting several mail domains. I'd like users to be able to log in, and set up their own custom filters for the server to process (the 'deliver all mail with [gentoo-announce] in the subject line to my 'Gentoo' folder' kind) when it delivers mail. I'd like them to be able to do this via a web interface.
Can anybody please point me at some software that will enable me to do this?