I do not understand.... remove posts? are you even talking about email?

Sorry....writing in english while you're speaking swedish isn't a good idea. I just meant I can't delete emails.....I click delete but nothing happens. Other commands seem to work OK.

What type of mail account Pop or IMAP?

Is it a gmail account?

It's a POP-account, telia.com...

Well I can not comment, I am limited to one language and rather poor with that one.

Try emptying the trash right click the folder and select empty. If that does not work, try File menu (Alt+F) > compact folders.

The first is obvious. The second simply frees space. Thunderbirds storage files do not shrink when you delete something, or move it. That is a very slow operation and is deferred until a dedicated compact which shrinks the file to only what they should contain. I have seen Compact free more than 2Gb of storage space and in the process functions like delete start working because the file is now small enough to write the deleted message too.

Nope, the storage can't be the problem as I haven't been able to delete any messages at all and the trash i empty. Maybe the problem is with ubuntu....I thought I might try uninstalling Thunderbird and then downloading it. Could that help?

Worth a try. download from here: http://www.mozilla.org/en-US/thunderbird/all.html

you would need to scroll down for swedish version and select the Linux download.

IMHO, this is not a good idea. You should not (never) download and install software that is available in your repository. I don't have THE solution, but I can't imagine that this will help. Better yet (although presumably just as useless) uninstall and reinstall from your Ubuntu repository.

First, if not done already, you might try:

  right click on folder > Properties > Repair Folder

If this doesn't help you might yet try to delete .msf files - backup your profile first (http://kb.mozillazine.org/Profile_backup ):

  Delete .msf files in your profile folder

But really only those with .msf extensions [1]. Deleting .msf files will delete some preference settings stored there of the respective folders (folder indexes, columns, sorting etc.).

[1] similar to this thread: http://forums.mozillazine.org/viewtopic.php?f=39&t=1867525

Access the Profile folder mail account and delete the Trash files.

Profile folders are hidden files, so you need to make hidden files visible first.

• http://kb.mozillazine.org/Show_hidden_files_and_folders

Linux and Unix Profile folders are located here:

• ~/.thunderbird/<Profile name>/

However, if you're using a third party build from Debian or Ubuntu, those builds store your profile folder here:

• ~/.mozilla-thunderbird<Profile name>.

Both are hidden folders.

To show hidden files in Nautilus (Gnome desktop's default file browser), choose "View -> Show Hidden Files".

In Thunderbird

• Help > Troubleshooting Information
• click on 'Show folder' button
• a new window will open
• Close Thunderbird now.

• click on 'Mail' folder
• click on mail account name
• look for 'Trash' and 'Trash.msf' files - delete these two files
• close the window - top right X
• Open thunderbird

Thunderbird will recreate a new Trash folder in your Folder Pane.