TLS (Transport Layer Security) protocol is a protocol for encrypting the connection between two servers, which ensures secure transmission of data between network hosts on the Internet.
TLS session is a sequence of the following events:
STARTTLS
command to offer the Server to use TLS during SMTP interaction.Ready to start TLS
command and sends the Server certificate to the Client.You can configure TLS security mode for situations when Kaspersky Secure Mail Gateway receives messages from another server (acts in the Server role) and sends messages to another server (acts in the Client role), as well as configure TLS settings for individual domains and domain groups that use the same IP address.