Overview of spam filtering
Spam is any unsolicited email message. You can control spam by creating a Sendmail Reject List or by using the Spam Filtering service to enable user-level spam control.
To provide spam filtering capability to users, your service provider must enable the service for your site.
Note: If the service is enabled for your site, the service is displayed in the View Services page along with the list of services available for your site. You do not have to perform any special configuration tasks in the control panel to enable spam filtering capability for your site users.
When the service is enabled for your site, the User Administrator is automatically invested with the ability to create email filter lists, set the spam threshold, and other spam management options. If you want to configure spam settings for your email account, you must log in with your account user name and password to the User Administrator control panel and configure the spam settings.
You can also use the Sendmail Reject List to reject spam. The Sendmail Reject List and spam filter lists vary in their approach and flexibility in managing spam.