I moved messages from IMAP folders to new local folders. Later, I renamed some of the local folders. Then, when trying to access the local folders, some could not be reached (folders would not show any sub-folders and would show "???" in the "Size' column. Invstigating through the file-system with Windows-Explorer, I found the folders and messages were present, but the path name was possibly too long for Thunderbird to navigate (folder-path 265 characters long). From the Thunderbird folder list, I renamed some of the parent folders to shorter nanes so the file-system paths to all the sub-folders and messages was below 230 characters long. After renaming the folders, all the sub-folders were reachable from the Thunderbird folder list, but the message-file and .msf file were no longer present. Thunderbird deleted these message-files/messages without warning or notification when Thunderbird renmed the folders. This caused the loss of about message-files and over 100 megabytes of emails. None of these message files or messages can be found in the Trash or in any other folders. I believe Thunderbird should be able to handle long-path names, and that Thunderbird should not delete files and messages without prompting to allow the action.
Please delete this duplicate report.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 752085
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