There is a bug here, I think. Have you noticed ? Take a message with an attachment in your reception box. Then, run the (usefull) attachment deletion function natively provided in Thunderbird (right-click on the attached file / delete). What happens ? The attached piece has disappeared, yes. But the whole message in the reception box is also automatically and unduely moved to the "bin". This is very annoying problem, from my point of view. Can you see it and reproduce it ? Thanks for help and information on the subject. Regards, Gabuzomeuh Attachement : screen capture