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trying to configure my Proton Mail account

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I'm trying to connect my proton mail account. I have the correct email address and password, but It gives an error message: "Unable to log in at server. Probably wrong configuration, username or password.

I'm trying to connect my proton mail account. I have the correct email address and password, but It gives an error message: "Unable to log in at server. Probably wrong configuration, username or password.
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You need to contact Proton email support for setup instruction for Thunderbird.