tlsMaxProtocolVersion

This option specifies the maximal TLS version to be used by the mail sender. It replaces in future together with the option tlsMinProtocolVersion the old option tlsProtocol. Until then the three options work together, i.e. only TLS protocol versions are supported, which conform to all three options.

Because TLS versions older than TLS 1.2 are declared as "deprecated" by the IETF, the mail sender now supports only version 1.2 or newer of the TLS protocol.

tlsMaxProtocolVersion

{ TLSv1.2 | TLSv1.3 }

TLSv1.2

TLS protocol version 1.2

TLSv1.3

TLS protocol version 1.3