but DKIM can only be set up for a domain if the domain owner also controls the MTA and can configure it to sign mail with the domain's key, so private people with their own domain can't use it if they use a third party server,
@kjpetrie I have three domains all hosted on the same account with Mythic beasts, they all have SPF, DKIM & DMARC configured and working. They are on the same server and use the same MTA.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.