Adding a footer to email if sent via TLS.

[Tony Kilbarger]

Our legal folks have asked if it is possible to add a footer to outbound email if it went out via TLS.  So if it successfully negotiates TLS, can we add a footer that says "Sent successfully via TLS 1.2".  Is this possible?  It would seem too late to add add after the connection is made.

[marc.luescherFRE]

Hi Tony,

you are correct and once the connection is established and the mail is sent, there is no way to add a disclaimer.

What about the approach of adding a TLS encrypted footer to all messages, enforce TLS encrypted for all outbound domains/connections and return the messages to the sender where secure TLS is not possible ? - Then you can remove your footer again and tell them NO TLS was possible...