[curben]

> ...email providers to try deploying a key management strategy similar to the one I’ve described in this post.

Assuming author meant key rotation, Protonmail[1] offers automatic key rotation by using CNAME that alias to DKIM TXT which is rotated once in a while.

[1]: https://protonmail.com/support/knowledge-base/anti-spoofing/

[ryan-c]

Automatic DKIM key rotation is common, I'm talking about publishing private keys.