Note: Marked messages are being processed by the mail server - This message sits in the "being processed" state for about a day and then comes back to the pending list

I started to have this problem recently. When I manually try to release (or 
whitelist) a message it goes to the pending state and I can see this message 
at the bottom:

      Note: Marked messages are being processed by the mail server. They 
will be removed from the pending list when relea


E-mail address actually gets added to the whitelist, but the message never 
gets delivered to my Inbox.

The message sits in the "being processed" state for about a day and then 
comes back to the pending list.

Any advice on what could be wrong is very much appreciated.

One thing that might be related to this, but also might not be is that not 
so long ago we had to IP renumber our entire subnet, so could it be some 
sort of IP that needs to be updated to enable the delivery of the message?

Thank you
-KY