We don’t like spam. And we need help fighting it, so this is what this post is about: Helping you help all of us that fight spam every day.
Let’s start with the concepts. I promise it’ll be quick:
Tables can't be imported directly. Please insert an image of your table which can be found here.
The information stating who can send e-mails is stored on a TXT record in the DNS zone.
No digital certificate is required. Public key is published using DNS TXT records.
The DMARC policy is published via DNS TXT record.