permissions to free-based emails

Greetings EE Gods....

I have Exchange 2003.
I am receiving "permission" errors sending to free-based emails:

our message did not reach some or all of the intended recipients.

      Subject:  Big Ear Welcome Letter

      Sent:     11/17/2008 10:21 AM

The following recipient(s) cannot be reached:

      walteroliver@hotmail.com on 11/17/2008 10:20 AM

            You do not have permission to send to this recipient.  For assistance, contact your system administrator.

            MSEXCH:MSExchangeIS:/DC=local/DC=bigearinc:EXCHANGE

Help?
Thanks
LVL 9
Evan CutlerVolunteer Chief Information OfficerAsked:
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Malli BoppeCommented:
Is this happening for all users or just one user.
Do have RDNS lookup for your mx record.
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Evan CutlerVolunteer Chief Information OfficerAuthor Commented:
not all, but a mixed bag.

RDNS matches mail server location.
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Malli BoppeCommented:
can you check message tracking for the failed emails.Also does this users run some thing different on their PC's to that of the normal users.
Also if possible check the spam filtering logs.
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Evan CutlerVolunteer Chief Information OfficerAuthor Commented:
well, the outbound queue is clear and running normally, so if that's the case,
is it another setting?
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Malli BoppeCommented:
Check the thing which says tracking the messages.You would have logs only if the message tracking is enabled.
http://www.amset.info/exchange/message-tracking.asp
On the Problamatic machines can you stop antivirus software for a while and test it.
Do you use any spam filtering software?
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Evan CutlerVolunteer Chief Information OfficerAuthor Commented:
Somehow the Exchange server just fixed itself.  Must be gremlins.
However, I did do what you stated, just in case for the future.
Thanks Much.
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