generate_dmarc

ai.intodns/scanner · Verify this server

Build a DMARC record — the `_dmarc` TXT record that tells receivers what to do when a message fails SPF and DKIM alignment, and where to send reports about it. The risk here is not syntax but policy. `p=none` monitors without affecting delivery and is where every deployment starts; `p=quarantine` sends failures to spam; `p=reject` refuses them outright, which silently destroys legitimate mail from any sender that was missed and gives that sender no explanation. Always publish a `rua` address: without aggregate reports there is no way to see which senders fail before enforcing against them. Use `percentage` to apply an enforcing policy to only part of the mail while rolling out. Returns the record, the host to publish it on (`_dmarc`), and warnings covering the mistakes that actually break mail — enforcing without reporting, reject at full coverage, pct at p=none, and strict alignment breaking subdomain senders and ESPs. Nothing is looked up or stored.