I can telnet to server on port 25. All internal and external send working. Messages are building in que on ProofPoint and not being received by Exchange 2007 server. No error messages in Event logs and 7.77 GB free on 272 GB disk drive.
Exchange
Last Comment
rstocke
8/22/2022 - Mon
lloydclinton
Have you contacted ProofPoint to see if they are having any problems or to ask for assistance from their help desk?
Read articles on MS Technet and even though we thought we had plenty of free disk space, moved uneeded file to another hard drive and Exchange resumed normal processing.