In my experience, deferrals don't show up in the tool, only outright blocks. Not sure if bug or by default. But yes, Proofpoint peeps roam this list, so one should be reaching out shortly.

Also, in the future, showing us the IP can also help.

On 7/4/24 4:17 PM, Patrick Landolt via mailop wrote:
Hi

We see a surge of deferred mails because of a proofpoint check resulting in mta responses like:
Deferred - see https://ipcheck.proofpoint.com/?ip=[…]

The actual ipcheck on the mentioned domain does - on multiple tested ips - return that nothing is blocked.

Is there a proofpoint representative here that can contact me off list to help solve the issue?

Best regards,
Patrick

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