Use email address

src/freedombone-app-turtl

         FQDN=${FQDN:-$TURTL_ONION_HOSTNAME}
         SITE_URL=${SITE_URL:-http://$TURTL_ONION_HOSTNAME}
     fi
-    ADMIN_EMAIL=${ADMIN_EMAIL:-$MY_USERNAME@$DEFAULT_DOMAIN_NAME}
+    ADMIN_EMAIL=${ADMIN_EMAIL:-$MY_EMAIL_ADDRESS}
     EMAIL_FROM=${EMAIL_FROM:-noreply@$DEFAULT_DOMAIN_NAME}
     SMTP_USER=${SMTP_USER:-}
     SMTP_PASS=${SMTP_PASS:-}