A new component for Joomla! / Mambo called "E-mail Directory" has been released. This component allows your visitors to add and list their e-mail addresses on your site.
Visit the DEMO to see it in action or the product site for more information. The component includes anti-spam protection using GD library or cloaking if GD not available. Logged-in users are able to contact listed emails using an online form. Listings are sortable by all fields and searchable. The full entry administration is available together with several settings of look and function and mass mail option.