Unable to relay to outside@outsideaddress.com. You do not have permission. m Exchange 2000

Hey All,
    I have one particular used who is having issues sending to an outside domain.  She can send email to other addresses with no issue.  However, with this particular domain she gets the following error:

      'name@outside.com' on 4/27/2005 9:00 AM
            You do not have permission to send to this recipient.  For assistance, contact your system administrator.
            <ouremailserver.ourdomain.com #5.7.1 smtp;550 5.7.1 Unable to relay for name@outside.com>

I did a search and most postings regarding this topic cover entire domains.  For example all outgoing email has this problem, however mine is only to one particular domain.  Thanks in advance.
PeteH67Asked:
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SembeeConnect With a Mentor Commented:
If it is just one domain then setup an SMTP Connector for that one domain to send via your ISP.

http://www.amset.info/exchange/smtp-connector.asp

Simon.
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o0JoeCool0oCommented:
if its one domain then that domain could be using a spam blocking service and you may be blacklisted, or they require a reverse lookup and your DNS doesnt give one, or even a SPF record whci hagain DNS must have. go to dnsreport.com and make sure everything there is ok
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PeteH67Author Commented:
Ok I got the following results after running the dnsreport:

Warn
-Mismatched glue
-All nameservers report identical NS records
-Mail server host name in greeting

Fail
-All nameservers respond
-NS agreement on SOA Serial #
-Duplicate MX records

Could any of these cause the error I am experiencing?  Or is this a problem on our end?
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o0JoeCool0oCommented:
I dont beleive so if the ones I mentioned passed then specifically SPF record and reverse lookup then it may not be a dNS issue. it could be you are on a blacklist
if you can send mail to everyone but one person I cant see the issue being on your end.
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PeteH67Author Commented:
So there isn't anything I can do?
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o0JoeCool0oCommented:
Well not much as far as I can tell, you can contact that domain and ask if they are using a spam service and then check that spam services site to see fi you are blacklisted. Most of these services have a site to go to to check your domain.
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