[Dovecot] Running a script when a mail arrives

[Dennis Becker]

Hi,
I'm trying to execute a script when a mail arrives in a given user's 
mailbox. Something like .dovecot.sieve.
The reason I'm not using sieve itself is that I need to do stuff on mail 
arrival, which is beyond sieve's features.

So is there a way to tell dovecot to run a script when a mail arrives in 
a certain mailbox? Optionally a solution to forward the whole mail to a 
script would be good too.

-- 
Dennis Becker