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Why all of a sudden-Sending of password did not succeed. Mail server mail.talktalk.net responded: Internal login failure.

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Why do I keep getting this error just lately with Thunderbird, then at some random time all the emails come through........Sending of password did not succeed. Mail server mail.talktalk.net responded: Internal login failure. Refer to server log for more information.

Why do I keep getting this error just lately with Thunderbird, then at some random time all the emails come through........Sending of password did not succeed. Mail server mail.talktalk.net responded: Internal login failure. Refer to server log for more information.

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This is an issue with the mail server, not Thunderbird. You need to contact talktalk.net support.