Your email can be plain text or formatted. As much formatting as possible will be retained, although the Post byEmail system will strip unnecessary HTML tags so that your email is displayed correctly. Note that you will need to use an email client that supports rich text or HTML formatting in order to make use of this feature. Most website based clients (Hotmail, Gmail) do support this, as do most desktop clients (Outlook, Mail). You may need to switch your client into rich text or formatted mode.