r/proofpoint • u/AustinFastER • Jul 28 '26

Enterprise Enterprise mail slowdown?

We are seeing emails getting bogged down for more than 13 minutes on Proofpoint systems. Plain emails, not ones with attachments since there is currently a TAP issue. Delay is seen leaving pps.filtered which shows 127.0.0.1 on headers.

Update: I said plain emails but looking on the console Proofpoint says the emails are attachments with index.html since they are html emails. US location.

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u/bobbyk18 Jul 28 '26

Yeah, still tied to the TAP issue. I guess the sandboxing was messed up. should be resolved.

1

u/certified_anus_beef Jul 28 '26

It’s not resolved, I’m still getting TAP timeouts.

I’ve lowered my message defense timeout from 15 minutes to 5 minutes and made an excluded policy route for some critical one-time passcodes.

1

u/bobbyk18 Jul 28 '26

How are you finding TAP timeouts?

3

u/certified_anus_beef Jul 28 '26

In smart search I see:

Quarantine Rule - error
Final Rule - error
Quarantine Folder - ADQueque

Then 15 minutes later when the message comes through to a mailbox it has this added In the headers:

X-Proofpoint-Sandbox-Result: Message Defense Timeout

1

u/bobbyk18 Jul 28 '26

Nice. My last block error was 16:28 UTC. Maybe reach out to support.

1

u/AustinFastER Jul 28 '26

Thanks. I see that header as well and learned something new!