You can use the following HTML tags to format your message.

• Paired tags The following paired tags will only work if you include a matching ending tag for each starting tag. For example, <b>Here's some bold text</b>.

  b, i, u, big, small, font, sub, sup, cite, code, h1, h2, h3, h4, h5, h6, em, s, strike, strong, tt, center, blockquote, ol, ul, dl.

  You can use <a href="...">link text</a> to create links, or if you just mention the URL (starting with "http://") in your message, a link will automatically be created.
• Single tags The following tags work as single tags -- they don't need a matching pair.

  hr, li, dt, dd

Note: for the moment, any HTML tags you include in your message will be included in the email that gets sent to subscribers. An improvement on that will be coming soon.

For a quick guide to HTML tags, try The Bare Bones Guide to HTML.