Le 8 mai 2014 à 14:51, Stephan Bosch a écrit : > [...] > Ehmm, what mail client is doing this? :)
Apple's Mail.app. > Afaik, forwarding messages should have a new Message-ID. I've tested this > with Thunderbird and it does that properly. I should perhaps have written "resend that message" instead of "forward that message"? You know, that action of "reintroducing a message into the transport system", as described in section 3.6.6 of RFC 5322. In that case, Mail.app adds "Resent-From:", "Resent-Date:" and "Resent-To:" fields to the resent message (but it doesn't add a "Resent-Message-ID:" field, even if it SHOULD do so). On the other hand, forwarding a message indeed builds a message with a new Message-ID. Best regards, Axel
