The email is form Cloudflare. [email protected]
Yes, I know what 521 error means. The IP address Is not from my server.
In fact, I have been receiving this email over and over for several months.
For the first month, I checked with SiteGround and they said there was nothing in the logs for this.
Now I am at CloudWays and I still get the same email.
Each time I receive the email it has a different IP address for my sever. The IP address is not from my origin server.