Help creating email alias MBP w/o ICloud
I'm stumped. Despite repeated attempts, I am unable to create an email alias on a MBP, OS High Sierra (v10.13.6), in Apple Mail (v11.5). I don't use ICloud for anything. Apple's instructions for creating an alias in OS High Sierra are:
What goes into the name/email address fields that appear when the + sign is clicked? No matter what I enter, I get Mailer Daemon mail whenever I mail to or from the alias I tried to create. Any help in the steps to create an alias in the Mail App, without ICloud, would be very much appreciated. I couldn't find a specific "Mail" discussion group. Sorry.
MacBook Pro