Values.DeliveryOptionsSourceSpecifies whether messages that use the configuration set are required to use Transport Layer Security (TLS).
type nonrec t = {tlsPolicy : TlsPolicy.t option;Specifies whether messages that use the configuration set are required to use Transport Layer Security (TLS). If the value is Require, messages are only delivered if a TLS connection can be established. If the value is Optional, messages can be delivered in plain text if a TLS connection can't be established.
*)}