First of all, don't panic
Fix: Error Code 0x8019019a When Setting Up Yahoo Mail in Windows 10 Mail App
Are you getting a “0x8019019a” error while accessing your email account with the Mail app on Windows 10 or Windows 11? Chances are that you are using your email account’s master password instead of the app-specific password. Here’s how to fix the issue.
Other reasons why you are unable to use the Mail app and getting the above error message are that the Mail app or your Windows operating system is buggy, the core files of the Mail app are corrupted, your system files are unusable, and more.
One way to fix the issues of an app is to update the app to the latest version. You may be using an outdated version of the Mail app which is causing the above error. You can fix this by updating the app.
