What is the size of your local folder inbox?

What is your anti-virus software?

Do you have a good backup of your Thunderbird profile folder?

christ1 said

What is the size of your local folder inbox? What is your anti-virus software? Do you have a good backup of your Thunderbird profile folder?

Hello,

I have moved around 1 gb of mail in local folder. But now Local Folder inbox Size is showing 381 mb.

Its have kaspersky endpoint security 11 antivirus.

Profile folder is there.

It appears your mail file(s) are corrupted. First of all create a backup of your Thunderbird profile folder. https://support.mozilla.org/kb/profiles-tb#w_backing-up-a-profile

Then try to rebuild the index file of the troubled folder. Right-click the folder - Properties - Repair Folder

Note: depending on the corruption this may erase messages from the affected folder which cannot be recovered anymore. Given the difference between the expected Inbox size and current Inbox size data loss most likely has already occurred. In that case you'd need to restore any lost data from the last good backup done prior to the corruption.

Corruption is often caused by anti-virus software messing with Thunderbird mail files. It is therefore recommended to create an exception for the Thunderbird profile folder, so that the real-time scanner won't attempt to scan the profile with your mail.

For more information on the profile location see http://kb.mozillazine.org/Profile_folder_-_Thunderbird

Also see http://kb.mozillazine.org/Keep_it_working_-_Thunderbird

christ1 said

It appears your mail file(s) are corrupted. First of all create a backup of your Thunderbird profile folder. https://support.mozilla.org/kb/profiles-tb#w_backing-up-a-profile Then try to rebuild the index file of the troubled folder. Right-click the folder - Properties - Repair Folder Note: depending on the corruption this may erase messages from the affected folder which cannot be recovered anymore. Given the difference between the expected Inbox size and current Inbox size data loss most likely has already occurred. In that case you'd need to restore any lost data from the last good backup done prior to the corruption. Corruption is often caused by anti-virus software messing with Thunderbird mail files. It is therefore recommended to create an exception for the Thunderbird profile folder, so that the real-time scanner won't attempt to scan the profile with your mail. For more information on the profile location see http://kb.mozillazine.org/Profile_folder_-_Thunderbird Also see http://kb.mozillazine.org/Keep_it_working_-_Thunderbird

I have this problem, not as serious as above, since several of my "Local Folders" are still in the Explorer view and not zero size, they are just not shown in the TB UI. See attached pictures showing the TB UI view and the OS Explorer view (marked folders are shown in the TB UI view).

Also I do not see this option "Repair folder"?

krister.ripstrand,

please start a new topic for your problem. https://support.mozilla.org/questions/new