Hi,
So, we have a new client that recently got Proofpoint. We created the account in Proofpoint, loaded up all the users, and placed the proofpoint IP's in the receive connector named mail.XXXXX.org frontend transpoort
Emails are passing through the filter (as clean, and listed as delivered by the proofpoint service). Most emails are making to the end user, however, certain domains are not (any user from that domain, not just certain ones).
I am puzzled, but I am also not a in-depth exchange guy.
The fear is there are other domains that the client is not receiving, and we just don't know it yet.
Any suggestions? Please.