I am new to Ubuntu, and have a question how to set up a Drupal on Ubuntu.
I have installed Apache, MySQL, PHP 5, phpmyadmin, etc, and they work fine. But one problem is left. Drupal warns me that there is no mail server working, when I finish setting up a new site with Drupal.
However, some say that installing a mail server is unnecessary, because Ubuntu sends e-mails out of the box. (http://groups.drupal.org/node/22401#comment-77421)
Is this true? If so, how can I take advantage of this feature?