Adam Bower abower@thebowery.co.uk wrote:
Interestingly I can't find any RFC that actually requires mail-followup-to to be implemented, does anybody know of such an RFC?
I don't think it's ever been in an RFC. Some email clients refuse to implement Bernstein's Mail-Followup-To and Mail-Reply-To, including nmh and Evolution. I'm not sure if Moz is another that has made a decision on this.
The correct ways to do it seem to be setting Reply-To if you really want to not get any off-list replies (sender), by using a "List Reply" command (respondant using client supporting List-Post header) or by filtering duplicates (sender getting replies), I think.
MJR