This is happening for one of the sites I admin. Post-by-email ceased functioning after the WP update. All other Jetpack features appear to be working, and I’ve completed troubleshooting this from a plug-in perspective (removed each and added back; no combination of plug-ins make it go).
I’ve utilized the Jetpack debug, and sent a message to support, but haven’t heard anything yet.
Thoughts? Suggestions?
Thanks!