You have configured Secure Transport (TLS) Compliance for all messages coming to and from an external domain, altostrat.com, that your end users communicate with via Gmail. What will your end users experience when messages are delivered to them from altostrat.com without TLS enabled?
When Secure Transport (TLS) Compliance is configured for all messages to and from an external domain, any incoming messages from that domain that do not have TLS enabled will be rejected and not delivered to the end user in any form. The sender will receive a non-delivery report indicating the message could not be delivered. This ensures the security of communications and compliance with the TLS requirements.
Cが正しいです。 https://support.google.com/a/answer/2520500?hl=ja
https://support.google.com/a/answer/2520500?hl=en#zippy=%2Cunderstand-what-happens-to-messages-sent-to-or-from-servers-that-dont-use-tls Incoming messages : Incoming messages from non-TLS connections are rejected without any notification to you. The sender gets a non-delivery report.
https://support.google.com/a/answer/2520500?hl=en#zippy=%2Cunderstand-what-happens-to-messages-sent-to-or-from-servers-that-dont-use-tls
All inbound or outbound messages are rejected when TLS compliance is not met https://support.google.com/a/answer/2520500?hl=en#zippy=%2Cunderstand-what-happens-to-messages-sent-to-or-from-servers-that-dont-use-tls
D is correct. When Secure Transport (TLS) Compliance is configured for messages coming to and from an external domain, such as altostrat.com, Gmail will attempt to enforce TLS encryption for these messages. If a message is sent from altostrat.com without TLS encryption enabled, Gmail will display a warning banner on the message when it is delivered to the end user's inbox. This banner informs the user that the message was not sent securely and may prompt them to exercise caution while interacting with the email.
I was wrong. https://support.google.com/a/answer/2520500?hl=en#zippy=%2Cunderstand-what-happens-to-messages-sent-to-or-from-servers-that-dont-use-tls Your Secure transports (TLS) compliance setting affects messages sent over non-TLS connections, for addresses and domains that you specify in the setting. Outgoing messages Messages aren't delivered, and will bounce. You'll get a non-delivery report. Gmail makes only one attempt to send messages over a non-TLS connection. Incoming messages Incoming messages from non-TLS connections are rejected without any notification to you. The sender gets a non-delivery report.
answer is c !
B- https://support.google.com/a/answer/2520500?hl=en#zippy=%2Cunderstand-what-happens-to-messages-sent-to-or-from-servers-that-dont-use-tls
B - user will not receive the email as Google will block non TLS compliant emails
B. The message will not be delivered to the end user in any form.
Incoming messages from non-TLS connections are rejected without any notification to you. The sender gets a non-delivery report. https://support.google.com/a/answer/2520500?hl=en#zippy=%2Cunderstand-what-happens-to-messages-sent-to-or-from-servers-that-dont-use-tls
B. The message will not be delivered to the end user in any form.