1 Try another availability checker, for example, http://uptime.onl 2 All errors should be in the server logs. So to be certain what is the errors cause better to check logs at first. Source: almost 3 years ago

1 If the service is an API or a website URL, you can use tools like https://uptime.onl to check if it works. Source: almost 3 years ago

After fix, I would recommend to monitor your website with a tool like https://uptime.onl/. Source: about 3 years ago

You can use services like uptime.onl or uptimerobot.com to do checks automatically. Source: about 3 years ago

Suddenly I started to receive "Connect timeout" errors for this blog from my website availability monitoring tool. - Source: dev.to / about 3 years ago

I used these tools in the past: https://mxtoolbox.com/ https://www.mail-tester.com/. - Source: Hacker News / about 1 month ago

Suprised to not see https://mxtoolbox.com in this list too. - Source: Hacker News / 5 months ago

MX Toolbox - https://mxtoolbox.com/ - may be a place to start digging. Source: 6 months ago

You can try https://mxtoolbox.com/. Source: 6 months ago

The url I want is https://mxtoolbox.com/ and the https://mxtoolbox.org/ one redirects to malware. Source: 6 months ago