Custom MailAuth Analyser Email Address

At the moment, MailAuth Analyser email addresses are in the format of [randomid]@check.dmarc-dns.com It would be nice if we can CNAME a domain of our own to check.dmarc-dns.com for a whitelabeled/branded analyser. EG: [randomid]@check.mydomain.com Even better, if we can create a custom/shared address for the account, for example 'mailtest@check.mydomain.com'