Just figured out, that rules seems to work out, out of the box for std user but seems not to be stable for shared user / mailboxes. In detail: I established a simple spam rule for the shared user, read in again (earlier verified) emails, but rule didn't move the email to the spam folder. As mentioned, I'm pretty new to grommunio, hence tried it out w/ and w/o "lda_twostep_ruleproc=1". Can't reproduce the working state (1 out of 10 retries) as of now :-( Is there anything special with shared user / mailboxes i have to consider?