Allright I think you pointed me in the right direction. This is the message I get now in /var/log/mail.log. It would appear that I would need to figure out how to make the server provide some authentication info to the relay or am I totally off base?
Aug 30 12:05:09 klusterphuck postfix/smtp: ED85C69C076: to=<firstname.lastname@example.org>, relay=smtp.ameritech.yahoo.com[126.96.36.199], delay=1, status=bounced (host smtp.ameritech.yahoo.com[188.8.131.52] said: 530 authentication required - for help go to http://help.yahoo.com/help/us/sbc/dsl/mail/pop/pop-11.html (in reply to MAIL FROM command))
The link that they provided only talked about configuring other programs to send mail through their servers.