> Why send mail as user@myhostname, when the named host will never > ever receive email?
Because I need to retain FROM what host it originated. If I see an email from root@domain I have no idea which host it came from. The emails are cron scripts and the like, not user-generated email. If 'origin' only affected the FROM and left the TO naked as was specified on the command-line, I'd be happy as a clam.