Save your HTML page through Firefox, then load up into notepad. Or download a 30 day trial of Dreamweaver. HTML emails need inline CSS styles if you do use CSS, and absolute paths for the images.
Aweber has a great HTML editor with the autoresponder service. there is also a feature that tells you the Spam rating of your message so you don't end up sending out your message only to get junked. Once it's sent, you can see how many people actually opened the email. I've tried 3 autoresponder services and Aweber is the only one I'll ever use again. NVU is a good WYSIWYG editor for HTML pages too. It's very easy to figure out and you can either publish straight from there or save and upload through FTP. Sheree