We have a single Microsoft SBS2011 server, running exchange, which is protected by AVG 2013.
We have an ongoing issue where mail stops arriving at our clients. There seems to be no events in the log, but we find if we restart the transport service, the problem is resolved immediately
Sometimes, we have to kill the service in the taskmanager, as when we try to stop or restart the service from the service manager console, the error denotes that it did not respond in a timely fasion.
In addition to this, sometimes, (not always) we note that there are poison massages in the exchange queue, and creating a new queue folder structure, resolves this too.
The reason I mention this is that I have read that if exchange receives posion messages, it does lock out the transport service, which is exactly our symptom. This is supposed to be a feature?? But its rather unsatisfactory if it is not drawn to anyones attention.
The frustration is that we dont know that the trnsport service has stopped working until it is obvious that no mail has arrived for an unreasonable period of time.
We removed AVG, and installed CalmAV, and it did not happen at all. Put AVG back on and the same problem arises. It only happens every few days, but it is very frustrating, and we would like to resolve it.
I have installed all of the latest service packs on the server, AVG is upto date, so I am a little lost now, as to what to do next.
Can anyone advise on how we can go about resolving this??