Select an app and open the gear menu in the browser toolbar. Save or discard pending editor changes first. These settings apply to the selected app, not your account.
- Obtain the correct connection details from your mail provider.
- Fill in the required fields. Treat the password as a secret, not as documentation text.
- Save SMTP settings.
- Use the test action when you are ready to send a real test message, and check its result.

If a saved configuration can be reset to system mail, read that action carefully: it changes which mail configuration the app uses. Never test against an unintended recipient. No live SMTP credentials or emails are used in these screenshots.