User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050317 Firefox/1.0.2 Build Identifier: Mozilla Thunderbird version 1.0.2 (20050317) Attachments with "Content-Disposition: attachment" is displayed automatically in the message window, but it shouldn't, as opposed to those with "Content-Disposition: inline". From RFC 2183 <http://www.faqs.org/rfcs/rfc2183.html>: 2.1 The Inline Disposition Type A bodypart should be marked `inline' if it is intended to be displayed automatically upon display of the message. Inline bodyparts should be presented in the order in which they occur, subject to the normal semantics of multipart messages. 2.2 The Attachment Disposition Type Bodyparts can be designated `attachment' to indicate that they are separate from the main body of the mail message, and that their display should not be automatic, but contingent upon some further action of the user. The MUA might instead present the user of a bitmap terminal with an iconic representation of the attachments, or, on character terminals, with a list of attachments from which the user could select for viewing or storage. Reproducible: Always Steps to Reproduce: 1. Compose a message and attach a plain text file. 2. Save the message as a draft. 3. Exit Thunderbird. 4. Open "Drafts" in "Local Folders" in your profile directory. 5. Edit the Content-Disposition header of the attachment so that it looks like: > Content-Disposition: attachment; filename="example.txt" 6. Open Thunderbird and see the message in the Drafts folder. Actual Results: The contents of the attachment is shown automatically without any user action. Expected Results: The contents of the attachment should not be shown automatically but with some user action.

see bug 185618

*** This bug has been marked as a duplicate of 147461 ***