If no attribute contains the user's email address, but it can be derived from other attributes, enter an email "template" here.<br> Templates should have the user's attribute name in form such as [cn], [uin], etc. such as <code>[cn]@mycompany.com</code>.<br> See also the <a href="http://drupal.org/node/997082">drupal.org documentation on LDAP tokens</a>.