I am running GW 8.01 and have two PO's.
The main PO, MTA, GWIA all live on a windows server and work great. I have a second PO that lives on a linux server.
The second PO can send internal/external mail successfully. It can also send external mail successfully. The problem is it can NOT receive external mail.

Anyone have an idea on how to troubleshoot?
Thank you.