First, thanks for the prompt response and please forgive the reply formatting. Web client is not helpful. I will attempt to provide info as per the links provided.
I drew my conclusion simply from watching "tail -f /var/log/mail" as I altered main.cf and did "rcpostfix restart" Was that naive? HTH. >>>> Wietse Venema <wie...@porcupine.org> 08/18/16 10:10 AM >>> >Joe Acquisto-j4: >> Using postfix 2.5.6. >> >> In main.cf, changed "relayhost" from and IP address to a valid domain. > > - the "sender" changed from the original sender domain to the host > name and domain of the postfix server. What is the evidence that led you to to this conclusion? See http://www.postfix.org/DEBUG_README.html#mail for how to report Postfix logging. > - the mail was shown as "queued" instead of "delivered" What is the evidence that led you to to this conclusion? See http://www.postfix.org/DEBUG_README.html#mail for how to report Postfix logging. > What can I do to retain the senders actual email address? Why do you believe that POSTFIX changed the sender's email address? Wietse