On Tue, 3 Oct 2017, Owen Jacobson wrote:
It’s not the format that’s the problem. Many clients display the date a message was received, not the Date: of the message itself, when showing dates in message lists. Mine (Mail.app, macOS Sierra, up-to-date on patches) does this.
*Sigh* well, at least they cannot expect that to accurately tell when it's sent.
Greetings, Ørjan.