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19  
20  
21  package org.apache.james.transport.matchers;
22  
23  import org.apache.mailet.base.GenericMatcher;
24  import org.apache.mailet.Mail;
25  
26  import java.util.Collection;
27  
28  /**
29   * Checks the sender's displayed domain name against a the hosts serviced by
30   * this mail context. <br>
31   * <br>
32   * Sample Configuration: <br>
33   * <br>
34   * &lt;mailet match="SenderHostIsLocal" class="SpamAssassin"&gt; &lt;/mailet&gt;
35   * <br>
36   * <br>
37   */
38  public class SenderHostIsLocal extends GenericMatcher {
39      public Collection match(Mail mail) {
40          if (mail.getSender() != null
41                  && this.getMailetContext().isLocalServer(
42                          mail.getSender().getHost().toLowerCase())) {
43              return mail.getRecipients();
44          }
45          return null;
46  
47      }
48  }