From a commentator Olguy over at Big Country

Look where they come from, Advisory provided by Google. GMX is a German web site and email provider. Their server is in Germany. I wonder when gmail, Protonmail, Hotmail, etc are going to start doing this? It is starting folks, concerted and persistent censuring and difficultly searching and surfing the web. I can copy and paste the URL and it loads fine and my malware and virus software yawns when I scan the URL. I may have to find another email server to use.

Warning – Visiting this web site may harm your computer

You’re about to leave the GMX service.

This page appears to contain malicious code that could be downloaded to your computer without your consent. You can learn more about harmful web content including viruses and other malicious code and how to protect your computer at StopBadware.org.
(Advisory provided by Google)

If you nevertheless want to visit this site, copy the following link and paste it into the address bar of your browser.

Further information about risks on the internet can be found in our help section.

Recommendation

Please do not visit this website.