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19  
20  
21  
22  package org.apache.james.smtpserver;
23  
24  /**
25   * Custom message handlers must implement this interface
26   * The message handlers will be server-wide common to all the SMTPHandlers,
27   * therefore the handlers must store all the state information
28   * in the SMTPSession object
29   */
30  public interface MessageHandler {
31      /*
32       * Handle Message
33      **/
34      void onMessage(SMTPSession session);
35  
36  }