Question sieve: debugging rules / log file with rule processing?

[Jehoschua]

Good evening

We have a very strange behaviour with sieve rules and it often seems as if the rules are not processed at all.

My 1st idea was to find the logfiles, but sieve is not listed as a service here: Plesk for Linux services logs and configuration files

Is it possible to enable logging the sieve rule processing?
Are there any tips & tricks to debug sieve rules?

Thanks a lot, kind regards,
Thomas

 

[jose.alvarez]

I am also interested in activating them.
For debugging purposes, there is a curious behavior in one of the mailboxes.