Include an admin folder in mutt

src/freedombone-base-email

     echo 'set rfc2047_parameters' >> /etc/Muttrc
     echo '' >> /etc/Muttrc
     echo '# Show inbox and sent items' >> /etc/Muttrc
-    echo 'mailboxes = =Sent =maybe-spam =spam' >> /etc/Muttrc
+    echo 'mailboxes = =admin =Sent =maybe-spam =spam' >> /etc/Muttrc
     echo '' >> /etc/Muttrc
     echo '# Alter these colours as needed for maximum bling' >> /etc/Muttrc
     echo 'color sidebar_new yellow default' >> /etc/Muttrc