'You do not have permission to send to this recipient'

Hi ,
we have exchange server 2003 , and we send email to a certain recipient in an external domain. He receives emails from all of us but from one user (lets say user A).
UserA  gets "..'You do not have permission to send to this recipient'
but he was able to send emails to this recipient without any issue. It all started suddenly.
The external email address is not disabled and receives email from our company just fine (except from userA).
UserA can send email anywhere else just fine.
Any ideas ?
c_hocklandAsked:
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SembeeCommented:
Is the bounce being generated by your server or the remote server? Message tracking will be able to tell you this if you cannot tell from the NDR.

Simon.
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c_hocklandAuthor Commented:
he didnt send me the email , but i will check from the message tracking and see.
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c_hocklandAuthor Commented:
ok simon,
it says

message submitted  from store,
sumbitted to categorizer
advanced queuing
message categorized and queued for routing
message queued for local delivery
message delivered locally to user@domain.com
smtp store driver: message delivered locally to user@domain.com

thus i can tell it never left our domain ??

any ideas?
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c_hocklandAuthor Commented:
it looks like i have a dns error. How can i change the dns settings for my exchange server ? I will have to forward to root hints.
any ideas ?
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c_hocklandAuthor Commented:
i swap the dns settings , and them removed them , (tried everything) but the email is still there...

now i am running out of ideas.
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SembeeCommented:
The DNS settings on the Exchange server itself should be quite simple - point the Exchange server at the domain controllers ONLY for DNS. No external DNS servers should be in the network configuration or in the Exchange configuration.

On the domain controllers what I usually do is configure forwarders and use the ISPs DNS servers as the forwarders.

How did you check DNS? Did you carry out an nslookup on the server to see whether the results that you are getting are the same as the internet?

Another temporary option would be to setup an SMTP Connector for that domain, configure the connector to use a smart host and set it to your ISPs SMTP server. That should allow the email to be delivered while you look to see why the messages appear to loop back on itself.

Simon.
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c_hocklandAuthor Commented:
Simon,
thanks for the reply.
2 things. The dns settings on the exchange server point to ISP dns ( I will change to the domain dontrollers/dns server of my domain)
I will create a connector as well and let you know the result.

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