On Dec 19, 2016, at 15:33, Gerben Wierda <gerben.wierda@rna.nl> wrote:

A simple question: I’ve installed roundcube on macOS Sierra with Server 5.2 and created a set of sieve rules in my dovecot setup. How can I check their functioning (other than send test mails) e.g. is there some logging I can set / look at?

I think you will see some sieve activity in the system logs. If that's not enough: https://wiki2.dovecot.org/Logging mail_debug=yes