Question: I have a message header and footer configured on my list. Why are they appearing as attachments?
Answer:
The display of the footer depends on the email client being used to view the message and also whether or not there are any attachments on the message. If Mailman receives a message with MIME parts (generally attachments such as Word files but could be an html or rich text formatted message without any attachments), the header and footer will be added as additional MIME parts. How those are displayed, however, will depend on the email client you are using to view them. Here are some examples:
Date: 03/2009 Author: R. Skiver Thompson