Forward bounces

Outlook290
Lately when using Outlook 2003, I try to forward an e-mail that I have

received in my inbox, the message bounces back to me stating"



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



Subject: RE: RFQ @ NIEHS in NC

Sent: 3/12/2007 10:11 AM



The following recipient(s) could not be reached:



'persons name' on 3/12/2007 10:12 AM

550 Relaying denied (#5.7.1) "



Any clues would be found helpfull. Thanks.


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