The author only mentioned STARTTLS as the way to secure SMTP. However, there are at least two other ways to do it: * TLS Wraper * Secure Tunnel And Amazon We

The author only mentioned STARTTLS as the way to secure SMTP. However, there are at least two other ways to do it: * TLS Wraper * Secure Tunnel And Amazon Web Services Simple Email Service accepts all three approaches. Granted the latter two may not be supported by a lot of providers, but hey is that the same thing with browsers securities? We deprecate old MTAs and old versions of them progressively. Just my two cents.