How to start programms with .qmail?

[Hans-Juergen Schwarz]

Hello all,
I like to start webalizer when I send a Mail to a certain address
(i.E. [EMAIL PROTECTED]) So I created a .qmail-webalizer file
with the following in it:
| /path/to/webalizer -and /all/the/options
but it won´t work.
Does anybody know how to handle that?
Thank you very much and best regards

Hans-Juergen