Fomat of Email Notifications

I searched other posts but didn't find any answers on this. We just recently purchased the product. I was testing out email notifications, which work fine. However, every email that comes across has this extra content:

Mime-Version: 1.0
Content-Type: multipart/related;
boundary="----=_Part_43_29563339.1168960112092"

------=_Part_43_29563339.1168960112092
Content-Type: text/plain;charset="UTF-8"
Content-Transfer-Encoding: 7bit

**** My Custom Email Message Shows Up Here Just Fine ****

------=_Part_43_29563339.1168960112092--

We're using Outlook 2003. Nothing weird. I tried Rich Text and Plain text, and no matter what, I still get this extra nonsense, which my end-users will surely get confused when they see all this extra text.

I need some help getting this resolved.