I was just testing out my git send-email setup by sending a patch to myself of the last three commits on master. I didn't realize that git format-patch and git send-email would also CC people mentioned in the signed-off-by lines and other places in the patches.
My apologies. At least I know it works now.
I guess I just gave up the surprise that I've got patches inbound for the start of the cryptographic signing protocol project. :)
Cheers! Dave