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19  
20  
21  
22  package org.apache.james.transport.matchers;
23  
24  import org.apache.mailet.base.GenericMatcher;
25  import org.apache.mailet.Mail;
26  
27  import java.util.Collection;
28  
29  /**
30   * <P>
31   * Matches mails that are sent by an client which is allowed to relay.
32   * </P>
33   * 
34   * <PRE><CODE> &lt;mailet match=&quot;SMTPIsAuthNetwork&quot;
35   * class=&quot;&lt;any-class&gt;&quot;&gt; </CODE></PRE>
36   * 
37   */
38  public class SMTPIsAuthNetwork extends GenericMatcher {
39  
40      /**
41       * The mail attribute which is set if the client is allowed to relay
42       */
43      private final static String SMTP_AUTH_NETWORK_NAME = "org.apache.james.SMTPIsAuthNetwork";
44  
45      public Collection match(Mail mail) {
46          String relayingAllowed = (String) mail
47                  .getAttribute(SMTP_AUTH_NETWORK_NAME);
48          if (relayingAllowed != null && relayingAllowed.equals("true")) {
49              return mail.getRecipients();
50          } else {
51              return null;
52          }
53      }
54  }