DNS (Domain Name System) is the internet's directory: it translates human-readable domain names into the IP addresses computers use to route packets. For email, DNS holds the records that prove who you are and authorise who sends on your behalf — SPF, DKIM, DMARC, BIMI, MX and reverse PTR all live as DNS records on your domain.
How DNS works in practice for email. When a receiving server gets a message from your domain, it queries DNS for the TXT records that describe your sending policy. It checks the SPF record to confirm the sending IP is allowed, the DKIM record to verify the signature, and the DMARC record to know what to do when those two disagree. None of these checks happen if the records are missing or malformed — and the receiver treats your mail accordingly.
Why DNS matters for senders. DNS is the silent layer that decides whether your mail authenticates. Get the records right and Gmail, Yahoo and Microsoft trust your sends from day one; get them wrong and your campaigns get filtered into spam or rejected outright. Modern email-sending platforms set the necessary records for you — but the authority to publish them still lives on your domain, in DNS.
Mailpro and DNS
The DNS records that matter, configured for you
SPF, DKIM, DMARC, BIMI and reverse DNS all live in DNS. Mailpro sets the right records and aligns them with our sending infrastructure — your authentication chain is correct from day one.