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Three glitches with Thunderbird

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1) Occasionally, an email in my inbox will disappear after I shut down in the evening and open in the morning. (Serious problem) 2) Often (1 out of 5) one email will appear twice in my inbox. When I delete one, the other disappears. (Just strange) 3) Occasionally, an email I send will appear in my inbox as well as my sent box. (A bit confusing but the messages get sent)

Thunderbird 52.7.0 Windows 10 pro Version 1709 Build 16299.431

Problems just started with the update before last.

Glitches 2 and 3 are just irritating I really would like to stop the loss of incoming emails in the inbox. If I save them in a folder, they don't get lost.

1) Occasionally, an email in my inbox will disappear after I shut down in the evening and open in the morning. (Serious problem) 2) Often (1 out of 5) one email will appear twice in my inbox. When I delete one, the other disappears. (Just strange) 3) Occasionally, an email I send will appear in my inbox as well as my sent box. (A bit confusing but the messages get sent) Thunderbird 52.7.0 Windows 10 pro Version 1709 Build 16299.431 Problems just started with the update before last. Glitches 2 and 3 are just irritating I really would like to stop the loss of incoming emails in the inbox. If I save them in a folder, they don't get lost.

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Thank you for your question. We are sorry to hear about your email duplicating, but we have some articles that will help you troubleshoot the duplicates.

If the mail is downloading repeatedly, these instructions will resolve the issue.

If the mail is duplicated and needs to be cleaned up, these instructions will guide you.

If you have any other issues, please report back and we are happy to help.