Support editing the In-Reply-To header
How could I edit the In-Reply-To header? My expectation was to be able to edit this header the same way one is able to set the Reply-To field when composing a new message. Research took me to how to add custom headers. However, I don't think the In-Reply-To header is a "new and custom" header that needs adding, I simply need to edit the value already assigned by default. Please let me know if I got this wrong. The reason for wanting to modify/set the In-Reply-To header is being able to reply to old archived lists and keep my response properly "threaded".