No outside email for administator account only???

I have a newly installed exchange server on sbs 2003 R2 with all service packs and updates.

Exchange works fine for receiving email from the LAN, and from the internet for all accounts, except for the Administrator account. This account can receive email from within the LAN just fine, and can send mail to both LAN and internet.... from this account.

BUT - it can not receive outside email.  When a user tries to send email to this account,  they get a smtp rejection - not a valid user.  All other user accounts work just fine.  Any ideas?

Thanks a lot.

Robert
rmarlanAsked:
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rrusteanCommented:
Have a look on the exchange general tab of the users properties from within active directory users and computers.  There is a delivery restrictions button.  Is anything set in there?  

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Jejin JosephCloud Evangelist Commented:
check the email address tab for the administrator account. Is it the same email address tat u r using to send emails ?
rmarlanAuthor Commented:
I did check delivery restrictions - there are none.  The email address is present.  The machine actually has 4 addresses listed...

Administrator@mydomain.com
Administrator@mydomain.local
postmaster@mydomain.com
postmaster@mydomain.local

But it must be correct, because I can receive email to Administrator@mydomain.com  from within the LAN (directly from the exchange server) - but not outside???

Robert
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Jejin JosephCloud Evangelist Commented:
send a mail from the administrators account to an external account n reply to it and see wat happens
rmarlanAuthor Commented:
I tried that - this is the error message....

<<< 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) 550 5.1.1 <administrator@mydomain.com>... User unknown <<< 503 RCPT first (#5.5.1)

Robert
rmarlanAuthor Commented:
My error - the mail was being bounced by a spam filter.  Exchange was fine. Sorry!
I will still give credit to rrsutean and coolwizz for good answers. Thank you!
Jejin JosephCloud Evangelist Commented:
Guess you missed to give me points :(
rrusteanCommented:
cheers :)
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