Currently Being ModeratedDec 4, 2012 7:31 PM (in response to UptimeJeff)
Duplicates show in webmail as well.
Same message ID.
Happening to everyone in the company seemingly at random from anyone else in the company. So it's not just from 1 person or happening to the same person.
Currently Being ModeratedDec 5, 2012 6:28 AM (in response to Tenn_Surety)
Do you use a 3rd party filtering service? (mxlogic, symantec, etc)
Take one example and follow the logs.
Do you see 2 messages arrive from outside or just 1?
Do you see 1 or 2 deliveries to the mailbox?