Newsletter (mailing list) bugs and questions is it really a good idea to reveal all this sensitive information in the header of the newsletter? And also, I see the newsletter has templates of its own, why aren't they used and it still gets sent in plain text, even when opting for "Send this newsletter in HTML"? I copy and pasted some text, and it isn't formatted in anyway. Perhaps add TinyMCE to the newsletter editor?
You should ask your webhost . Contentteller is only adding required fields such as From, To, Reply-To, MIME, Content-Type, X-Priority, X-MSMail-Priority, and X-Mailer to the header. Enabling the HTML option will only allow the use of HTML tags like <b>Bold Text</b>. Good idea.
