Unable to Send Email

I am unable to send email out. I receive the following error message:

our message did not reach some or all of the intended recipients.

  Subject:	
  Sent:	9/1/2004 7:53 AM

The following recipient(s) could not be reached:

[email protected]’ on 9/1/2004 7:53 AM

550 5.7.1 Unable to relay for [email protected]

Can anyone advise me on how to fix this error? Is this a setup issue?

Thanks in advance!

Hi,

This ticket has already been replied.Kindly check it.