When trying to deliver your message, the mail server at virtual.net.au encountered problems with the following addresses: For <[email protected]>, [Site (agent-software.com.au/70.84.12.138) said: 550 5.0.0 <[email protected]>... User unknown] Please see http://netwinsite.com/surgemail/help/bounce.htm For a more detailed explanation see http://netwinsite.com/surgemail/deliver_failed.htm Diagnostic-code smtp; [Site (agent-software.com.au/70.84.12.138) said: 550 5.0.0 <[email protected]>... User unknown] Please see http://netwinsite.com/surgemail/help/bounce.htm