feature-request: harvest S/MIME signatures of outgoing mails and publish them to DNS

[cyberbix]

How about the idea of harvesting S/MIME Signatures of outgoing mail and publish, or even prepare the TLSA SMIMEA records ?

How could it work: A user of my company sends mails with his S/MIME signature through a smilla enabled Postfix.

Postfix "harvests" the S/MIME signature of the outgoing mail and prepares for publishing the SMIMEA records.