You shouldn't rely on only ed25519 for DKIM, always double-sign your email with RSA as a fallback The problem with email will forever be that there are so many

You shouldn't rely on only ed25519 for DKIM, always double-sign your email with RSA as a fallback The problem with email will forever be that there are so many badly configured email servers out there. Any new standard in email will always need a backwards compatibility ad infinitum. In your case I'd recommend moving your DNS to another DNS provider. Just pick any and go with that.