I’ve recently starting getting this “Error 521: Web server is down” in several emails, but each time the site is absolutely fine and when I check the IP, it’s not the IP of my server.
Now, one quick note is - I’ve recently installed Ezoic (ad platform) on my site and I’m using their Cloudflare integration: https://support.ezoic.com/hc/en-us/articles/206329735-How-To-Integrate-Using-Cloudflare
But, I reached out to them and the IPs aren’t theirs either.
So, I’m sort of confused.
Any help is appreciated.
PS I saw this topic before but it was closed with no solution. I have the exact same problem.