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Remove your local 'ImapMail' folder: First remove your local 'ImapMail' folder:
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Remove the 'ImapMail' folder in your windows profile. After that remove the 'ImapMail' folder in your windows profile.
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 * Restart thunderbird
restart thunderbird


My D-ITET Account runs out of quota, but I have no data stored at all. What is the space eater?


You have probably activated the synchronisation in Thunderbird. This Feature creates a local copy of every mail in your imap account. This feature can be used, when working with a self managed laptop which is not always online. In this offline mode you will access the emails through this offline stored data.

In most cases you do not need this files, so you should delete them and free up your disk space.

Thunderbird Settings

/!\ The following steps have to be done for every Mail account configured in Thunderbird.

  • Open Thunderbird and select on the left-side column the account.
  • Right click on it and choose settings.
  • Choose Synchronization & Storage on the left-side column underneath the account.

  • Uncheck the option Keep messages for this account on this computer

  • Click button 'Advanced', uncheck all checkboxes and click ok.

  • Select option Synchronize the most recent 1 days

  • Click the OK button.

  • Close Thunderbird if this was the last account otherwise start over with step 1 for the next account.

Continue with the description for your operating system to finalize the configuration.

Removing sychronized mails in Windows

  • Start Thunderbird once to make sure the settings take effect. Then close Thunderbird afterwards.

First remove your local 'ImapMail' folder:

  • Click on Start -> Computer

  • Change to C:\Users\<YOUR USERNAME>\AppData\Roaming\Thunderbird\Profiles\<RANDOM NAME>.default\ and delete the folder 'ImapMail'.

After that remove the 'ImapMail' folder in your windows profile.

  • First you have to set the option "show hidden files" via control panel)
  • Change to homes(\\homes7.ee.ethz.ch)(H:)\.win7_prof.V2\AppData\Roaming\Thunderbird\Profiles\<RANDOM NAME>.default\ and delete the folder 'ImapMail'.

Now restart thunderbird

Removing sychronized mails in Linux

  1. Start Thunderbird once to make sure the settings take effect. Then close Thunderbird afterwards.
  2. In case something goes wrong we do not delete the synchronisation files but move them to /scratch.

    • Open a Terminal
    • Change to the Synchronisation directory.
      cd ~/.thunderbird/<RANDOM NAME>.default/ImapMail
    • Now move any directory and its corresponding *.msf file to /scratch.

      # example to move all D-ITET and NETHZ Accounts
      mv imap* mail* /scratch

Now start thunderbird again. If in any case you miss some data (which should not happen!) just close Thunderbird, move all files from scratch back to its origin and restart thunderbird.


FAQ/IMAPdisableSync (last edited 2020-09-09 13:58:48 by maegger)