-i can find all mail and see the body in a search context but when i try to open in a dedicated window, i  
  obtain a blank window. 
-the incoming/send mail view is completely blank, no historization of older receive/sent mail is shown.

Hi folks, after a restoring a backup using this procedure ( '''''https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer''''' ) in a new machine that don't have internet connection, I initially can find and open my old mail when i was offline and download any attached files. Furthermore, the incoming mail view had the same status of mail received at the moment of the backup. Now, after some times, it's not possible to do the same things: -i can find all mail and see the body in a search context but when i try to open in a dedicated window, i obtain a blank window. -the incoming/send mail view is completely blank, no historization of older receive/sent mail is shown. This not happens for the mail moved-archived in specific folder different from incoming/sent mail, in that case i can open the email and download the attached files. I thank you in advance for your help, C.