Mail statistics (was: DNS status update ; changes on anna/elsa)

JFYI: https://monitor.opensuse.org/grafana/d/mvnQn-jGk/mail-metrics-copy?orgId=1&from=now-90d&to=now hopefully helps us a bit to see what happens on our Mail servers. I did not check the forums machine, yet, as this was not on my radar so far... Regards, Lars