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Inbound Rate Limiter Not Triggered

Posted: Wed Jan 09, 2019 4:55 pm
by bcw

My system settings 2.0.18-1 (Plesk Version 17.8.11) are as follows:

Inbound Message Limit: 75
Inbound Counting Period: 5
Inbound Expiry Time: 180

I just experienced an instance where a large volume (~ 15,000) of email sent from a single email address, using several eBay servers, to a single address did not trigger a rate limit. I have seen rate limited IPs previously so I am wondering why in this case it did not occur.