JMAP is already TLS-only <https://datatracker.ietf.org/doc/html/rfc8620#section-8.1 https://datatracker.ietf.org/doc/html/rfc8620#section-8.1>: > To ensure the

JMAP is already TLS-only <https://datatracker.ietf.org/doc/html/rfc8620#section-8.1 https://datatracker.ietf.org/doc/html/rfc8620#section-8.1>: > To ensure the confidentiality and integrity of data sent and received via JMAP, all requests MUST use TLS 1.2 or later, following the recommendations in RFC 7525. Servers SHOULD support TLS 1.3 or later. > Clients MUST validate TLS certificate chains to protect against man-in-the-middle attacks.