553 invalid sender message

  • Thread starter Thread starter Dayne A. Jacobs
  • Start date Start date
D

Dayne A. Jacobs

We have one user that gets a communication failure 553
invalid sender message when he sends to users at a
particular company. Everyone else in the company does not
have this problem and he also can send to everyone else.
Any ideas what is going on? Exchange 5.5 is the server.
Outlook 2002 AND Outlook 2000 is client software. Only
his account has this problem.
 
Had another user with the same problem on a different e-
mail address being sent to a different company.
Anyone have any ideas???!!!!
 
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