Duplicate inbox folder in Thunderbird 127.x to Windows 11 migrations

    • As part of a neighborhood help, I upgraded an elderly Thunderbird to a new Windows 11 - everything would be there again and working if a second inbox folder with the same name but with a mark (2) and an orange star had not been created. Now all emails arrive in both inboxes at the same time - I have been using Thunderbird for 24 years and have changed hardware and operating systems without any problems - does anyone know how to remove a duplicate inbox folder without losing everything?

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    • Thanks Werner for these clear instructions on how to delete the 2nd inbox account yourself - what good is TB’s self-deletation mode? - I have zero experience in this regard!

    Please show a screenshot of it (hide personal data)

    Is the mail account set up as POP3 or as IMAP?

    How ​​exactly did you move the Thunderbird profile to the new PC?

    Show original language (German)

    ….keep on rockin' 🤘🏼🤘🏼🤘🏼

    Thanks for the feedback:

    Please show a screenshot of it (make personal data unrecognizable) not possible in the short term

    Is the mail account set up as POP3 or as IMAP? IMAP

    How ​​exactly did you move the Thunderbird profile to the new PC?

    Copied over the entire Thunderbird folder from the Roaming folder

    Show original language (German)

    Hello @Wejoyauss13

    I would try the following:

    First move the emails from the inbox folder to their own folder (e.g. Temp) using drag & drop. This way they don’t get lost.

    Then delete any emails that are still in the second inbox folder and see if one of the folders can be deleted (right mouse button).

    Show original language (German)

    Lesen, was auf dem Bildschirm steht.

    Check whether the email account has been created twice and, if so, delete one of them.

    If it doesn’t help, first save the profile folder as a copy, then delete all email accounts within Thunderbird and then re-enter the email account manually.

    PS: With IMAP definitions, no emails should actually be lost by deleting and re-creating a mail account, as all emails are then reloaded from the server mailbox. However, individually changed settings for the folder views must then be made again. And if everything goes wrong, you can import the saved original profile again if necessary.

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    Hobby-Nerd ohne wirtschaftliche Abhängigkeiten zur Swisscom

    agree @Werner - but unfortunately any existing contacts (address book) are not resynchronized via IMAP - they would have to be transferred somehow from the previous to the new Thunderbird installation.

    But this is a little easier than copying the entire profile:

    Address book export:

    [https://www.heise.de/tipps-tricks/Thunderbird-Adressbuch-exportieren-so-geht-s-7475143.html](https://www.heise.de/tipps-tricks/Thunderbird-Adressbuch- export-how-to-7475143.html)

    Address book import:

    [https://www.heise.de/tipps-tricks/Thunderbird-Adressbuch-importieren-so-geht-s-7474814.html](https://www.heise.de/tipps-tricks/Thunderbird-Adressbuch- import-how-to-7474814.html)

    Show original language (German)

    ….keep on rockin' 🤘🏼🤘🏼🤘🏼

    Thanks Werner for these clear instructions on how to delete the 2nd inbox account yourself - what good is TB’s self-deletation mode? - I have zero experience in this regard!

    Show original language (German)