HI

Our Exchange 2003 system has strange problem: It couldn't send mail to the
specific address. It will return the error message immediatly:

"The message could not be delivered because the recipient's destination
email system is unknown or invalid. Please check the address and try again,
or contact your system administrator to verify connectivity to the email
system of the recipient.
"

The speeling of the adderss is correct and this situation is in only one
user. That user could send mail to other address same domain but not this
specific one! We haven't noticed any other malfunctions in the mail traffic.

Have anyone ides what could be wrong?

Best Regards

Hans/ICT-Support

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