No DMARC record was found
Technical
No TXT record beginning with v=DMARC1 was published at _dmarc under the domain.
- Observed
- _dmarc TXT
- absent
- Standard
- RFC 7489
What this means
Your domain does not tell receiving mail servers what to do with messages that fail your checks, and does not ask anyone to report it. You have no visibility into who is sending mail as you.
Even with SPF in place, receiving servers are not told to act on a failure. Gmail and Yahoo now require DMARC for bulk senders, so this also affects deliverability.
What to ask your developer
Ask them to publish a DMARC record at p=none with a reporting address first, read the reports for a month, then move to quarantine and finally reject.
How to fix it
TXT at _dmarc: "v=DMARC1; p=none; rua=mailto:dmarc-reports@your-domain". Move to p=quarantine then p=reject once reports are clean.