SQL Mail Error

All,

From my SQL server, I am able to send email test notification etc, from my database mail to any email address within the domain.

When I try to send to any address outside of my domain, I get an error. Here's the error:

error message

Please help.
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isamesAsked:
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plusone3055Commented:
this is 99% not an issue with SQL server, but rather your SMTP Domain.  Best guess would be that the IP address that SQL server is on needs to be added as an allowable sender of email outside the domain. I would speak to the SMTP admins first to see if that is the case.

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Microsoft SQL Server 2008

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