I have two domains set up on my web server, and want to be able to send email from both of them. I understand that I can set up postfix to
receive email for multiple domains using virtual alias maps. But what if I want mail from webmaster to be sent from
webmaster@domain1.com and mail from fred to be sent from
fred@domain2.com. I can manually change myorigin and restart postfix, but there's got to be a better way.