Do you usually forget to attach the assignments in emails? If the answer is yes, you don't have to worry about that problem any more. Because I am working on the bug 244455. This bug reminds the user to attach the file when the user clicks the "send" button.
What I am further looking for is the user can add keywords in the list of keyword that Thunderbird will search in body of the email.
In progress of the release I had found an extension which does the same thing. But David found that I am not allowed to look at it's code as it is licensed under GPL3. If I would be allowed to take a look at the code, it would be easier to complete the task.
Plus, I need your help to list all the keywords. Please add your keyword and your name in contributors here. http://zenit.senecac.on.ca/wiki/index.php/User:Attachment_Reminder#List_OF_Keywords