<style type="text/css"> </style> is the basic version. It depends on what doctype you use, but just run it through the validdator and it will let you know.
@bathurst_guySep 18.2006 — #Yes. Make sure you set every style though (eg font and background colors, link colours, etc) otherwise they will inherit the properties of the stylesheet that the email is being viewed in (eg hotmail stylesheet etc)
@bathurst_guySep 18.2006 — #Some email clients cut off everything before the <body> tag, so in this case you may have to make the styles inline, ie<p style="width:100px;">Paragraph</style>I recently listened to a Podcast from boagworld.com (number 46 Selling web design services) that touched on html email marketing. They seemed to think that its better to provide just a logo, some brief text and a hyperlink to a page on your website that has the full "html email". Just an idea.