It is possible to set up "Internet Mail service" to not send HTML. This is really more server related but some people have found the information useful.
Microsoft Exchange Server 5.5 DocumentationNOTE: If using these instruction to set up your server to send plain text e-mail, then you should set all options for HTML/MIME to "never" or "disable".
Original material courtesy of Gerald E. Boyd.
Last modified:
May 24, 2007