email query

[sylvan dacounha]

Dear All
   
  I am using Sendmail ver 8.12.5-7 on RED HAT 9 and its working fine
   
  i am able to receive mail from anywhere but have noticed recently that when i send mail to yahoo or hotmail the mail does not go to inbox but to junk folder.
   
  but when i send  mail to rediffmail or other mail servers like user at sancharnet.in or user at nio.org it goes perfect OK to that users inbox
   
   
  can anyone help me out..
   
  is there anything in sendmail which requires to be done
   
   
  really would appreciate your help
   
   
  thnks n regards
   
  simon

       
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