Tried to set default several times but no such luck

[cyberzork]

If your Windows is not settings eM Client as default mailer in the usual settings place, then you might have a possible registry problem. Make sure to reboot after setting default.

Also see this thread for more info how to set eM Client as default if you have eg: Windows 11

Windows 11 - making em Client default email client

In Windows 11, if I choose to set eM client as default during final installation stage, I am taken to the Windows Settings page, which would leave most people no knowing what to do next. This was a simple one-step task in Windows 10. In Windows 11, changing all the required settings is quite a painful exercise, particularly if em Client has never been set as default before. Can you make easier by either automatically changing Windows 11 defaults (if selected), or at least explain how to do it…