Windows 10 Outlook showing wrong e-mail address in title bar.

[Gamezone]

When I look at "My accounts" in Outlook, it`s showing wrong e-mail address in the title. It shows my xxxx@gmail.com, but when I send mail from this account, it`s being sent from the right account xxx@outlook.com. I`m also signed in with my Outlook.com account on Windows.

 

[Gamezone]

I meant Windows Mail.