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I get not more mails

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Hello dear Mozilla Helpers,

i cant i think since 8 Months no emails for my email adress at Thunderbird : familie.weigel@googlemail.com I need the mail back i must work with that email adress at work. I hope you can help me thank you.

Dear Dominik Weigel

Hello dear Mozilla Helpers, i cant i think since 8 Months no emails for my email adress at Thunderbird : familie.weigel@googlemail.com I need the mail back i must work with that email adress at work. I hope you can help me thank you. Dear Dominik Weigel
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Are you using OAuth to authenticate with Gmail? You can check by navigating to Account Settings -> Server Settings and looking at the "Authentication method" option.