Thanks for the response @coelmay
That’s what I originally thought. However, I got this (below) email about a week ago, and cannot figure out how to match this new format.
We recently notified you about a change we are making to our DKIM DNS records that will impact your email delivery. These changes have now gone live and you may delete the following DNS record from your DNS provider:
Name/Alias Domain dreamhost._domainkey
If you haven’t already, please be sure to add the following TXT record to your domain with your DNS provider as soon as possible:
Name/Alias Domain example.com._domainkey
You can retrieve the new key for your domain in the Manage Websites page of your DreamHost panel, in the “DNS” section.