Trouble installing Postfix on Ubuntu 16.04 droplet server

Hey everyone. I was using `this tutorial on how to install Postfix on an Ubuntu 16.04 server. Everything in the guide was going fine until step 7, when I realized that Maildir did not install properly.

When I try the command “ls -R ~/Maildir” i get an error reading “/home/aaron/Maildir: No such file or directory”

I followed all the steps while logged in as user aaron, and the guide says the following command is supposed to add the Maildir directory for the user:

“sudo postconf -e ‘home_mailbox= Maildir/’”

Is it possible the necessary command might have changed?

Any other ideas on why this might be?

thanks