I have just added a site to my IIS on the exchange server. As a result I had to restart the iis. This seemed to flush out a huge email queue of old emails and NDR's - 2 months worth and I am wondering where this would be. I dont think this is coincidence as just after I restarted IIS I had a number of calls from users alerting me to this fact. I often look at the queues in system manager and there is sometimes one or two in there which I flush out but never this amount.
Do you know what queue this is? What are all the queues that I should actively monitor to make sure this does not happen again? Why are NDR's and emails (seems like only to certain companies) getting caught up and why is there no notification to this?
I really need to make sure this does not happen again.