C# asp AjaxControlToolKit image appear as html tag in email message

[Jase]

I have used the AjaxControlToolKit as some sort of a WYSWYG editor to create email message.What I'm trying to accomplish is to be able to allow people to use the editor to add in images and send the final product (in HTML form) as email. The image of the email is stored on the server. The email message received should be something like normal marketing email with images and text.The problem now is that text being formatted in the editor shows up correctly in the receiver's email client but the image displays as \[code\]<img src=http://stackoverflow.com/questions/12236706/....\[/code\]. The path of the image is correct and the image did show up at the editor before leaving the editor screen.The emails tested are Hotmail(did not prompt to allow things images), Gmail and Ms outlook.Anyone knows what might be the problem.