SSL and TLS in not only for the website itself , for example in the domain name, this domain can also be use for emails like example: test@domainnme.com, we use also this settings , for the email to pass-through or else if you setup an email, in athird party email client
it wont work, SSL also encrypts the message, that travels example to the cloud , but after the email has been sent its no longer encrypted or the email has been recieved, thanks for the informative post, i think i already made a post like this one but still this is helpful nice job