Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How can I prevent Thunderbird to add the extension .txt to a file when open the attachment. I have the problem with .patch files which I want look with notepad++. The problem is that notepad++ does not detect the right formating for the file because the extension is .txt.

If I drag the file on the desktop an double click all is working. Why change Thunderbird the file name on opening?

I am working on Windows 7.

share|improve this question
Have you seen if the .txt appears if sent to another email client? – random Mar 20 '11 at 18:06
Outlook does not do it. And a web mailer like Google also does not change the name of the attachment on open it. – Horcrux7 Mar 20 '11 at 18:34

The plugin OpenAttachmentByExtension solve my problem.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.