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.

Who is Participating?
Glen KnightConnect With a Mentor Commented:
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:
Glen KnightConnect With a Mentor Commented:
rkanabusAuthor Commented:
Super, thanks it works fine now!

Mohammad Ishtyaq KhatriCommented:
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