Nope, DKIM is tied to the domain and DNS.
Comment on What are the ramifications of letting an old domain that was used for email go back into the market?
lambalicious@lemmy.sdf.org 4 weeks agoThe purchaser of that domain will be able to send and receive email from your addresses.
Wait wait wait, DKIM doesn’t solve this???
MangoPenguin@lemmy.blahaj.zone 4 weeks ago
kevincox@lemmy.ml 4 weeks ago
The owner of the domain owns DKIM. It offers no protection against that.
The only actual protection would be PGP because it provides your key as an identity rather than the domain itself.