Problem with renew certificates - The request message was malformed :: Method not allowed

Thanks for digging into the root causes here @_az.

Nope, that one has been enabled in prod since the beginning of April 2018. It was the change we announced in this API announcements post: JWS POST Content-Type Header Enforcement

I suspect the breakage was hidden by the fact that Certbot was using GET requests for the certificate fetch until POST-as-GET became mandatory.

4 Likes