Sorry for the noise Greg, On this day, August 27, 2021 thus sayeth Bryan Brattlof: > Changes in v3: > - Fix issue causing some emails to drop their In-Reply-To: header. > > (For the curious: NullMailer & my email provider where conspiring) > This turns out to be untrue :( I've been testing my git-send-email setup on some friends without issue. Somewhere between me and the mailing list In-Reply-To: headers are being dropped. I'll be back, but you can safely drop any patches from me today :( Again sorry for the noise ~Bryan