fi
# Create new certificate and copy it to /etc/letsencrypt.
-certbot certonly --standalone --agree-tos -m "${mail}" -d "$(hostname -f)"
+certbot certonly --standalone --agree-tos -m "${mail_address}" -d "$(hostname -f)"
# Remove iptables rule to open port 80 if we added it.
if [ "${open_iptables}" -eq "1" ]; then