Non-delivery of mail

 We are at v4r3 and are using the AS400 as a pop server.  I also have a 
firewall installed on the As400.   I can see a series of messages on the 
firewall that continue to  try to be delivered but never get through.  
Eventually, the message below  is found in the mail server framework jobs on 
the AS400 and I believe the two events are connected.  Do I have to setup 
Mailer-Daemon as an account on my AS400?  This does not appear to be 
interfering with delivery of e-mail.  It's just one of those annoyances that I 
would like to solve.
                                                                                
     
 Message ID . . . . . . :   TCP5128                                             
 Date sent  . . . . . . :   05/27/99      Time sent  . . . . . . :   14:05:00   
                                                                                
 Message . . . . :   Unable to send non-delivery note.                          
                                                                                
 Cause . . . . . :   The POP non-delivery exit was trying to notify an          
   originator of a failure to deliver a note. The non-delivery note was not     
   deliverable.                                                                 
                                                                                
  The originator of the note was: Mailer-Daemon@CHE400.STATE.SC.US         
 Recovery  . . . :   This message is issued when a non-delivery note cannot be  
   sent to the originator of a note. There may be an error in the directory or  
   the SMTP alias table for this address.                                       

If anyone has any ideas, I would really appreciate some thoughts or maybe point 
me in the direction of some reading material.                                   
                                               

Many Thanks,
Camille Brown
S. C. Commission on Higher Education
cbrown@che400.state.sc.us


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