outlook 2007

[flyboy.2]

I have a pop3 account to send and receive email. I can receive, but when I try to send it says:

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

Subject:

Sent: 10/19/2009 3:30 PM

The following recipient(s) cannot be reached:

roy burrell on 10/19/2009 3:30 PM

554 5.7.1 <r.burrell@hughes.net>: Recipient address rejected: Access denied

Any Ideas how to make it send mail?

Edited October 20, 2009 by flyboy.2