Look for Reply with the same format, and uncheck it.

I have to warn you, most don't like to get or give posts in html
Most probability of problems
 please help me i want to have my reply to button automaticly apply my custom stationary when i reply to an email. it works  when i create NEW mail messages, i figured it out how to do that with the compose tab in tools , but when i reply to a  received message with the reply button it uses a blank white email ,  how can i make the reply button use my custom stationary ?? anyone ???