Is there anyway to create an automatic warning if the Outbound queue grows to a certain size/age? We had a situation where our Ironport was unable to communicate with our external DNS source and mail queued on the box for over 5 hours until users began complaining. It would be great to have an alert kicked off after some threshold? Is there any SNMP MIBs or other solution that someone has come up with? Ironport tech support did not know of any mechanism. Seamless email flow with alerting would seem to be something that Ironport would have built in.