How to Fix Google Workspace SMTP Authentication Error?
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A Google Workspace SMTP authentication error shows up when Google restricts an app from signing in with your regular password.
Google wants to keep your account safe, so the app uses more secure methods, such as an App Password or OAuth 2.0, for signing in.
These are a few problems that might occur while fixing the Google Workspace SMTP authentication error:
- Wrong SMTP settings
- Blocked port access
- Username formatting