Symantec Messaging Gateway / Delivery Queue Continually Filling
Greetings Symantec Support Forum,
We have a Symantec Messaging Gateway currently running version 9.5.3-3, the gateway forwards mail to our Exchange Server 2010
We had a scare the other day when external email stopped flowing in. We found that this was being caused by the SMG's Delivery Queue being filled with tens of thousands of what seem like SPAM messages. After clearing the delivery queue external mail started to flow back in.
The issue now is that the delivery queue continues to accumulate about 100 of these per hour. They all have similar errors listed:
421 Closing Connection
451 4.4.2 [internal] send BODY failed
451 4.4.2 [internal] send RSET failed
451 4.4.2 [internal] connection closed by remote host
They are all To: a valid internal address and From: an external address (some dont seem valid), the route is listed as Control-Center
Is something misconfigured? I can continue to clear the delivery queue but why are these messages getting stuck in the first place?
Any help or insight you can offer would be greatly appreciated,