Notifications: Ensure deliver of WAN Link notifications
We've recently had the problem that the primary uplink in a failover setup went down, but we did not get a notification mail from the Astaro because the backup line did not come up quick enough, so there was no line for sending the mail out. The mail was queued on the Astaro and sent out after the primary line was up again. Actually, the "up" notification was sent our before the "down" notification.
I think it would be a good idea to wait for the backup line to come up before sending out the notification.