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All my folders have disapeared and I cannot see allegedly unread mesages in the inbox which is the only remaining folder

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  • Ultima risposta di Toad-Hall

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All my folders have disapeared and I cannot see allegedly unread mesages in the inbox which is the only remaining folder

All my folders have disapeared and I cannot see allegedly unread mesages in the inbox which is the only remaining folder

Soluzione scelta

Have you got these settings;

  • 'Menu icon' > 'Folders' > 'All'
  • 'Menu icon' > 'View' > 'Messages' > 'All'
  • 'Menu icon' > 'View' > 'Threads' > 'All'

Do you have any of the 'Quick Filter Bar' filters enabled? uncheck anything that is selected. See image showing Quick Filter Bar.

Is this an imap or pop mail account ?

If imap: Right click on mail account and select 'Subscribe' to see list. Select folders you need to see and click on 'Subscribe' button click on OK

If pop: Check profile. Make hidden files and folders visible: http://kb.mozillazine.org/Show_hidden_files_and_folders

In Thunderbird

  • Help > Troubleshooting Information
  • click on 'Open Folder' button

a new window opens showing contents of profile name folder.

  • Close Thunderbird now - this is important
  • click on 'Mail' folder

How many pop mail accounts do you see? What are the names of the pop mail accounts? Are they identical but one has a number at the end? Post image showing contents of the 'Mail' folder.

  • click on 'pop mail account name' folder

do you see a list of files that correspond to the names of Folders that are missing? Do you see mbox files; they have no extension? There should also be .msf index files as well. If the eg: Inbox folder had subfolders then you also see an 'Inbox.sbd' folder which should have more mbox files etc. Post an image showing contents of the pop mail account folder(s).


If all the folders and files seem correct:

  • Go back up to the profile name folder which shows the 'Mail' folder.
  • scroll down, locate and delete this file: foldertree.json

Restart Thunderbird. Report on results of deleting foldertree.json and post images.

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Soluzione scelta

Have you got these settings;

  • 'Menu icon' > 'Folders' > 'All'
  • 'Menu icon' > 'View' > 'Messages' > 'All'
  • 'Menu icon' > 'View' > 'Threads' > 'All'

Do you have any of the 'Quick Filter Bar' filters enabled? uncheck anything that is selected. See image showing Quick Filter Bar.

Is this an imap or pop mail account ?

If imap: Right click on mail account and select 'Subscribe' to see list. Select folders you need to see and click on 'Subscribe' button click on OK

If pop: Check profile. Make hidden files and folders visible: http://kb.mozillazine.org/Show_hidden_files_and_folders

In Thunderbird

  • Help > Troubleshooting Information
  • click on 'Open Folder' button

a new window opens showing contents of profile name folder.

  • Close Thunderbird now - this is important
  • click on 'Mail' folder

How many pop mail accounts do you see? What are the names of the pop mail accounts? Are they identical but one has a number at the end? Post image showing contents of the 'Mail' folder.

  • click on 'pop mail account name' folder

do you see a list of files that correspond to the names of Folders that are missing? Do you see mbox files; they have no extension? There should also be .msf index files as well. If the eg: Inbox folder had subfolders then you also see an 'Inbox.sbd' folder which should have more mbox files etc. Post an image showing contents of the pop mail account folder(s).


If all the folders and files seem correct:

  • Go back up to the profile name folder which shows the 'Mail' folder.
  • scroll down, locate and delete this file: foldertree.json

Restart Thunderbird. Report on results of deleting foldertree.json and post images.