Mailto links not working from Chrome on Windows 10. I recently encountered an issue where all mailto links listed on websites were not working or opening in Chrome or Firefox browsers. The operating system was Windows 10 and email client was Windows Live Mail. As it turns out, the mailto association was incorrect so Chrome, Firefox and several other browsers couldn't set Windows Mail to automatically open the mailto links.
How I fixed – Mailto Links Not Working
Open Set Associations: Control Panel > Programs > Default Programs > Associate a file type or protocol with a program
From the list, select MAILTO and click Change Properties
Select the default program you would like to have handle the mailto links, and click OK.
Close the Set Associations Window and Control Panel window and try an example > mailto link.