Thank you Falko...
It has been commented out now and I restarted PostFix
relay_domains = hash:/etc/postfix/relay-host-names
I will look through SF forums to see if an article is posted with a solution to my present problem of the server not allowing me to send email out- it won't authenticate my president <at> giganetwireless <dot> com address password with resepct to outgoing email???
Thank you Falko