Error Message Sender denied

One of my users can't send to one user in another domain. have sent an email to He gets an error message:

Reason: Other address status
Something about the address specified in the message caused this DSN.

Transcript of session:
554 5.1.0 Sender denied

When he sents a mail to another user of that company it works: to All of our company can sent email to without an error. We use Exchange 2007. I think the problem is the other side. Is it possilbe to deny the receiving of emails from one sender to one recipient in Exchange?`

Thanks for help
Who is Participating?
Madan SharmaConnect With a Mentor ConsultantCommented:

just right click on mail and select junk then click on block sender

Using EMC ->  First create mail contact for that user which you want to black Under Recipient Configuration (Only need if you want to black an outside user)
then go to
Organization Configuration -> Hub Transport -> Transport Rule
create new transport rule
Conditions:- from people and sent to ( choose sender and receiver ) then click on next
Action:- Send bounce message to sender with enhanced status code
next -> next ->new->Finish

Hope it works for you.
Madan SharmaConsultantCommented:
Bounce error show that the recipient has denied this particular user to accept mail. this can done through exchange as well as with outlook.
gspiesslAuthor Commented:
And how can I do this through exchange or outlook?
Madan SharmaConsultantCommented:
For Outlook:-
by doing above the sender of particular mail will be blocked. if you don't have mail from that send which you want to block then you have to go to junk mail setting under option and add manually his/her mail id
gspiesslAuthor Commented:
For Outlook
when I block the mail id it will not be generated an error message, I think.
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