Message encryption audit log reporting
We need an audit log that will detail every message that came in and out and whether it was send using TLS or not. Ideally, the audit log would contain the following fields:
Message ID, TLS or SMTP, timestamp, sender, recipient, subject
Security and Compliance/Mail Flow/Dashboard/Mail flow insights
/Outbound and Inbound mail flow/Messages protected in transit (by TLS)/View Details.
With older TLS versions being sunset, this is a must!!!
We need to see details of emails:
Sender email address
Recipient email address
Nick Russo commented
The healthcare and other industries sometimes have to prove that certain e-mail was transmitted using TLS. I opened a case with Microsoft and turns out that there is no way to find out if a message was sent using TLS in Office 365. Also no way to download the raw SMTP logs, which I could have used to prove TLS was in use.