This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Duplicate emails

  • 3 majibu
  • 1 ana tatizo hili
  • 6 views
  • Last reply by Hansl67

trek102
trek102
more options

I copied all emails from an Old server to a New server using Thunderbird but somehow Thunderbird created duplicates. Here are the steps i did:

Thunderbird Setup Old server - setup Local Directory Thunderbird Setup New Server - setup Local Directory Switched to Offline mode, so working with all emails local copy. While in Offline, copy all emails from Old Server to New Server Switch to Online Thunderbird starts uploading all (local) New server emails to New Server End result: When in Offline mode, I have all emails in New Server (as expected) When I go into Online mode, I have all duplicates. Its seems I am then seeing all server and local copies of each email. How can I get rid of duplicates or get them to sync correctly?

I copied all emails from an Old server to a New server using Thunderbird but somehow Thunderbird created duplicates. Here are the steps i did: Thunderbird Setup Old server - setup Local Directory Thunderbird Setup New Server - setup Local Directory Switched to Offline mode, so working with all emails local copy. While in Offline, copy all emails from Old Server to New Server Switch to Online Thunderbird starts uploading all (local) New server emails to New Server End result: When in Offline mode, I have all emails in New Server (as expected) When I go into Online mode, I have all duplicates. Its seems I am then seeing all server and local copies of each email. How can I get rid of duplicates or get them to sync correctly?

All Replies (3)

trek102
trek102 Mwenye swali
more options

hello? Anyone?

День сумо
День сумо
more options

Hello there trek21. We have read your message. We try to help you.

Oké,hello there. What is happening at the moment,can I ask?


Greetings Firefox volunteer.

Modified by День сумо

Hansl67
Hansl67
more options

I had a similar problem due to the setting of "When sending messages, automatically ... Place a copy in" under "Copies & Folders" for the my mail server account.

For my gmail account I seem to need to check this box to save mail that I am sending.

But if I check this box for my outlook account then I start to see duplicates of all my sent email.

I assume this is because outlook automatically saves sent emails but gmail needs to be told.

I'm not really sure whether or not this is the same problem you are seeing, but playing with this setting for your new server might help.