Select the SpamAssassin option from the Email Management Row. A list of your domain names and their spam filter settings will appear.
You may choose to modify the spam rejection level of all domain names by clicking the Select a value for all Domains dropdown box and choosing a level. Alternatively, you may set values for each domain name individually.
A lower number means that more email will be rejected as spam.
You may choose to whitelist or black list email addresses. Whitelisting will cause all emails from an address to arrive despite any triggers from the spam filter. Blacklisting will block all email from the address.
Once you have updated your settings, click update. You will see a confirmation that says Spam Blocking levels have been updated. Your spam filter is now enabled and configured.