=== SPF

Check the ip, sender, helo against SPF. Add the following attributes to the
mail object:

....
 org.apache.james.transport.mailets.spf.explanation
 org.apache.james.transport.mailets.spf.result
....

Sample configuration:

....
<mailet match="All" class="SPF">
  <addHeader>true</addHeader>
  <debug>false</debug>
</mailet>
....