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The STAT command did not succeed. Error getting message number and sizes. Mail server pop.gmail.com responded: Invalid credentials.

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Error message on only one of my four gmail accounts.

"The STAT command did not succeed. Error getting message number and sizes. Mail server pop.gmail.com responded: Invalid credentials."

nothing has changed in my settings, yet this problem continues to present. need some help, please.

Error message on only one of my four gmail accounts. "The STAT command did not succeed. Error getting message number and sizes. Mail server pop.gmail.com responded: Invalid credentials." nothing has changed in my settings, yet this problem continues to present. need some help, please.

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What is the authentication method on the incoming and outgoing servers? If it's 'normal password', change to OAuth2.

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I have this same problem, on only one of my two gmail accounts. Nothing has changed in my settings. I checked the authentication method on the smtp server, and it reads OAuth2. Please help.