After I have added formatted content in the Editor control when the page is active, I will loose some or all of the formatting if I am change or add format to text from the end of the content to the beginning. Example:

I have bolded some words. If I start bolding other words while moving in reverse back to the start of the content, I will loose the bolded format of the other text, but everything is fine if I am moving from the start to the end. This does not occur until I bold the second word while moving to the front of the content.

Suggestion for another control: You should create a web email control with the Editor. The only mandatory property someone would need to provide is the server. This way a web visitor would not be dependent on their local email client, and the emails could be stored in a database.