fancy HTML Mail with Microsoft Outlook
how to make fancy HTML emails with Outlook: make the email as an HTML file, view it in IE, and choose "send page" from the IE mail button. Tips: don't use background images; don't expect anything to center with margin:auto; it is weird and difficult (and weirdly, modal) to edit the email in Outlook, so you might as well do all the editing on the original HTML file. Test the email on yourself so you know what CSS outlook will disregard. Also, in IE 6/Outlook 2003, an <hr /> gets tacked on the end; delete it before sending.
HTML Mail with Microsoft Outlook.