DNS Not Verifying

If DNS does not verify, do not send production email from the domain.

Checklist

• You are editing the authoritative DNS provider.
• A record host and value match PING8.
• MX record points to the mail host.
• SPF is a single TXT record at the correct host.
• DKIM selector and value are exact.
• DMARC host is _dmarc.
• PTR/rDNS is configured by the IP provider.
• Cloudflare mail records are DNS only.

Useful commands

dig A mail.yourdomain.com
dig MX yourdomain.com
dig TXT yourdomain.com
dig TXT default._domainkey.yourdomain.com
dig TXT _dmarc.yourdomain.com
dig -x 203.0.113.10

Fix order

1. Fix A and MX first.
2. Fix SPF.
3. Fix DKIM.
4. Fix DMARC.
5. Fix PTR.
6. Re-run PING8 verification.