[MM3-users] Mails sent by mailman-web runjobs hourly

I get lots of mails originating from the mailman-web runjobs hourly. They are sent to mailman@<mytld>. The content looks like

07:00:03 [Q] INFO Enqueued 12571 07:00:03 [Q] INFO Enqueued 12572 07:00:03 [Q] INFO Enqueued 12573

How can I disable these emails?