Hi, My problem is w/ Exchange 2003 running on Windows Server Standard 2003. I'm having messages refused with error code 5.4.6. I've looked this up and it is supposedly caused by 2 contacts or users having the same email address. I am sure that this condition does not exist. I have searched my AD several times for this condition and have not found anything. The strange thing is that it seems to affect certain individuals more than others. BTW, this is only happening with external messages being delivered to our server. I sent myself a message from my home account on Sunday and received this error message. Today (Monday) I had my wife send me a message from my home account & it was delivered, however, I did restart the mail server this morning. One employee still has this problem even after the restart. This problem is driving me nuts! If any of you have ever experienced this sort of thing, I would appreciate any help you could give me. Let me know if you need any additional information.
Thanks in advance,
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