On 02/11/2014 08:22 AM, A.L.E.C wrote:
No, in 1.0 these headers aren't added to forwards too. However, I see Thunderbird, for example, adds these headers and I think this is not a bad idea. This should be done in core not as a plugin.
One thing to consider. It is possible to forward many messages in one message. Should References and In-Reply-To be set in such a case? If so, to what values?
I see Thunderbird puts all forwarded messages IDs in References, but (only) one in In-Reply-To. That might be not what we want, but what's the intended behaviour here I'm not sure.