Context on @ISOCSwitzerland's event of today are two RFCs published in August 2025:

1.
#RFC9787: Guidance on End-to-End Email Security (cf. https://www.rfc-editor.org/rfc/rfc9787.html)

2.
#RFC9788: Header Protection for Cryptographically Protected Email
(cf. https://www.rfc-editor.org/rfc/rfc9788.html)