Question procmail filtering with plesk onyx and postfix

[PeterKi]

I have successfully running plesk onyx 17.0.17 on my ubuntu 16.04 LTS vServer.
I use postfix with horde web mail and I am quite happy with it.
Now I want to do some mail autoprocessing with procmail but I cannot find any guide how to implement this.
Procmail is vital to me and I wonder why this is missing from the plesk GUI.
How can I get procmail implemented with plesk?

 

[IgorG]

Procmail was not tested with Plesk, therefore, we cannot guarantee its proper work on a Plesk server. Please submit this feature on Plesk User Voice