Is there a trick to get the sieve trace working?

I tried the following, but nothing gets logged.

sieve_user_log = /var/log/dovecot-sievetrace/user.log

sieve_trace_dir = /var/log/dovecot-sievetrace/

sieve_trace_level = matching

sieve_trace_debug = yes

sieve_trace_addresses = yes

I also tried "matching" instead of only matching because that is what I can see in the documentation for pigeonhole sieve. (https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration)

But nothing seems to get more info out of dovecot, imapsieve, sieve, pigeonhole thing.

The directory /var/log/dovecot-sievetrace/ is 777 dovecot:dovecot. It should be possible for dovecot to log in that directory I think.

Michael