This report grades the email authentication posture of spfwise.com against the same checks that mailbox providers apply to inbound mail. The grade above is derived directly from what is published in DNS right now, so it reflects the domain exactly as a receiver sees it.
A strong result here means three things are in place at once: SPF authorizes the right senders, DKIM signs outgoing mail with a valid key, and DMARC ties them together with a policy that tells receivers what to do when a message fails. Transport security records add a further layer by protecting the connection itself.
Want the same breakdown for your own domain? Run a scan and you will get an identical grade with the exact records to fix anything that is weak.