I do the same with a domain catchall, and I've received emails from Cloudflare just fine. Then again, if there were emails I've not been getting from them, I w

I do the same with a domain catchall, and I've received emails from Cloudflare just fine. Then again, if there were emails I've not been getting from them, I would be none the wiser. I wouldn't be surprised if many people do username+cloudflare@gmail.com, so excluding it outright would be really silly.