Check if your IPs are listed on PDR , usually that's why. A manager over PPE is on-list too, I believe.

https://ipcheck.proofpoint.com/

- Mark Alley

On 1/5/2024 3:37 PM, Thomas Johnson via mailop wrote:
Hello-

We're seeing some dropped connections from various servers on ppe-hosted.com <http://ppe-hosted.com> - the Proofpoint hosted service.

I'd like to discuss with an admin there, but I cannot locate any contact information online for them.

Is anyone from Proofpoint on here? Or does anyone have a contact?

Please feel free to conact me offlist, if that's preferred.

Tom


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