courier imap and maildrop (like sieve of cyrus ?)

[slemke]

Hello @all,

we are using an 1&1 rootserver with plesk and are happy - the only thing we are missing is a mail filter language like sieve of cyrus. sieve can put based on filters mails directly into subdirs.
I have read that for courier imap there is "maildrop" - is there anywhere a plugin for plesk (or only with a manual config) to use this kind of functionality ?

Regards,
Sebastian