SMTP TLS Negotiation Services is a secure email transport layer that helps protect email communications from being intercepted and read by unauthorized individuals. It uses a combination of public key and symmetric key cryptography to encrypt email messages so that only the intended recipient can read them.
Secure SMTP or SMTPS is the practice of using TLS to secure communication between an email server and an email client. This is typically done by configuring the email server to use STARTTLS, and the email client to connect using TLS.
In conclusion, the SMTP TLS negotiation services provide a secure and convenient way to send and receive email messages. This service is available free of charge and is easy to set up and use.