Exchange 2007 Second Email Domain Issue

I have an SBS 2008 box.

Problem Summary:

email for one domain (the default) is set up and receiving correctly.
email for their second domain is not.  

the two domains are xxx.com and yyy.com

The primary xxx.com is being received.  The secondary, yyy.com, is getting rejected with the following message "Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.7.1 Unable to relay (state 14)."

yyy.com is in the accepted domains and I added it to the Email Address policy.  I have restarted the Exchange Transport Service but I still get this message.  Any help would be appreciated.

Also, I will be restarting the server at the end of the day when all employees are off the system.

Cheers
Mark
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bobbydall2000Asked:
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bobbydall2000Connect With a Mentor Author Commented:
Update.  it was the sonicwall in front of the exchange server.  they are not compatible with IE 9 so the change we made didn't work.  had to log back in with Firefox, add the extra domain to the allowed list and all is well.
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bobbydall2000Author Commented:
Update.  A restart of the server did not cure this.  I still get the 550 Unable to relay error.  DNS is pointing correctly, it just bounces back.  Help!
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