Gateway SMTP or SMTP gateway also transfers emails among various servers but, not like SMTP relay, it’s permitted to transform the message if needed. SMTP gateways tend to be firewalls that rewrite addresses or intermediary SMTP servers. It may be the right option for smaller sized 1-person enterprises who https://www.upwork.com/services/product/development-it-let-s-encrypt-premium-ssl-installation-service-or-fix-https-related-errors-1390579816356401152?ref=project_share&tier=0