kmail lost some emails!

[Luca Ferrari]

Hi all,
hope someone can help me. Today my disk run out of quota while kmail was 
opened. All the emails in a local folder disappeared, while the other folders 
seems to be intact. Even reopening kmail does not produce any effect: only 
one folder seems damaged. The folder has other subfolders that contain mails 
that are displayed. Is there any way to repair the situation (hoping the 
emails were not effectively lost)?

Thanks,
Luca