In theory, there is RFC 7929 and RFC 8162 [PGP and S/MIME keys over DANE], but I...

jcranmer on April 10, 2019 | parent | context | favorite | on: Making email more secure with MTA-STS standard

In theory, there is RFC 7929 and RFC 8162 [PGP and S/MIME keys over DANE], but I don't think DNS is the best way to expose that information. I also don't think anyone (important) actually supports these mechanisms to retrieve public keys.