Feels like a bot net ploy

Hello.

Thank you for your review.

It happens if you use suspicious proxy servers or your IP belongs to a spam active subnet.

You can always tune plugin’s behaviour by using your private Black & White Lists. The instruction is here: https://cleantalk.org/help/blacklist-usage

Anyways, please, create a Ticket in our system so we can check your profile and incoming spam check requests:
https://cleantalk.org/my/support/open

Your CleanTalk Control Panel: [ https://cleantalk.org/my/ ].

Best wishes.