Sender address setting

[aix tiger]

Guys
   
  I am trying to send an email from RHEL box to microsoft exchange server, but i am not receeieving mails. Exchange admin guy told me to include sender name in mail command prompt so that sender name should already exist on Exchanger server,
   
  Please help me , how can i resolve that issue ? How should i specify sender name in "mail" command ???
   
  Regards
   
  Khurram

       
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