This is not how email works, though.
edit: I feel their pain - I've spent the past week fighting AI scrapers on multiple sites hitting routes that somehow bypass Cloudflare's cache. Thousands of requests per minute, often to URLs that have never even existed. Baidu and OpenAI, I'm looking at you.
Plus hitting the endpoints for authentication that return 403 over and over.
I also do not have a robots.txt so google doesnt index.
Got some scanners who left a message how to index or dei dex, but was like 3 lines total in my log (thats not abusive).
But yeah, blocking the whole of Asia stopped soooo much of the net-shit.