HTML Email: As you can see below, Drupal can be configured for HTML only mimemail. If Drupal is installed correctly and permissions allow, users can choose HTML mail during signup. MimeMail plugin is only available for Drupal 4.7 http://drupal.org/project/Modules/category/64 Here's the Mailman plugin for Drupal 5/6:http://webscripts.softpedia.com/script/Modules/Drupal-Modules/User-mailman-register-47712.html Here's what the configuration looks like: From http://hackfest.obnosis.com (Drupal 5.3) and http://l0calh0st.obnosis.com (Drupal 6.5) Mail Please choose a mail engine. E-mail address: A valid e-mail address for this website, used by the auto-mailer during registration, new password requests, notifications, etc. Use mime mail for all messages Use the mime mail module to deliver all site messages. With this option, system emails will have styles and formatting Input format Filtered HTML Web page addresses and e-mail addresses turn into links automatically.Allowed HTML tags: