I've been trying to login in the Desktop Mail app for Windows but it doesn't work at all.

The password and username are good for sure because I've logged in via browser and they work fine. But via the app it says it's the wrong one.

I tried before TFA and after TFA and it's the same result. Doesn't log in at all. 

Either it's a bug or some messed up settings somewhere. But since it's the native app this should work smoother than other mail clients. 

And what's strange is that on my mac mail client works just fine. 

Any ideas how to set this up?