problem sending emails from Exchange on SBS 2003

Hi, I am having problems sending email from SBS 2003 using Exchange 2003.

I am getting the following message when try to send email:

The following recipient(s) could not be reached:

There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
< #5.5.0 smtp;550-5.7.1 [] The IP you're using to send mail is not authorized to>

The IP address is Static,

Or anyone knows how to configure to MS Exchange 2003 to send email via ISP smtp server??

Thanks for help.

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Glen KnightCommented:
In System Manager under connectors create a new SMTP connector and set it to use a smarthost.  This will be your ISP's smarthost.

You could also try and resolve the issue you have by following these instructions:

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Glen KnightCommented:
rkanabusAuthor Commented:
Super, thanks it works fine now!

Mohammad Ishtyaq khatriSr. EngineerCommented:
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