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Resolving Google Error 535-5.7.8: Username and Password Not Accepted


Last updated on Sep 20, 2023

Encountering Google Error 535-5.7.8 can be frustrating when connecting your inbox to a platform. In this guide, we'll help you navigate this issue and provide solutions for a seamless connection.

Facing the Error: If you've received the error message below during your connection attempt:

"SMTP Error: Invalid login: 535-5.7.8 Username and Password not accepted."

Troubleshooting Steps: This error often indicates that "Less Secure Apps" are not enabled on your email account. Follow these steps to resolve the issue:

  1. Ensure Less Secure Apps Are Enabled:

    • Admin Side: Check and enable "Less Secure Apps" on the admin side of your email account by visiting this link.

    • Inbox Side: Similarly, enable "Less Secure Apps" on your inbox side through this link.

  2. Verify Login Information:

    Double-check that you are using the correct login credentials for your Google inbox.

  3. Toggling Less Secure App Settings:

    If you've confirmed that both settings are enabled and the correct login details are used, try toggling the "Less Secure App" settings on and off.

Conclusion: Google Error 535-5.7.8 can be resolved by ensuring that "Less Secure Apps" are enabled both in the admin and inbox sides of your email account. If the issue persists, verifying your login details and toggling the settings may help. Follow these steps for a smooth and error-free email account connection.