Yahoo: 2 Factor Authentication, App password and Less secure apps

Most often this solution is applied to the Yahoo's "Too many bad auth attempts" issue.

If you use Yahoo account with 2 Factor Authentication, you need to create and App password for Mailbird.

1. Go to Account info and click "Account security" on the left

2. Click "Manage app passwords"

3. Select "Other app" and put "Mailbird"

4. The new password will be generated

Then add your account in Mailbird normally via Settings -> Accounts -> Add. Paste the app password in the Password field in Mailbird.