# Check your domain’s SPF, DKIM and DMARC > Enter your domain. We look up its public DNS records and tell you what’s set, what’s missing and what to fix. Canonical: https://tellnod.com/tools/email-domain-checker Last updated: 2026-11-06 Author: Tellnod team This is an interactive tool at the page URL. It reads the public DNS records of the domain you enter. ## What it checks - SPF: present, a single record, and ending in ~all or -all - DMARC: present, and whether its policy is none, quarantine or reject - DKIM: keys at the selector names common senders use ## FAQ ### Do you contact my mail server? No. The checker only reads public DNS records, the same ones any receiving mail server reads. ### Why does it say DKIM wasn’t found when I have it? DKIM keys live under a name the sender picks, and DNS can’t list them. We check the names most senders use. If yours uses another, check its setup page. ### Do I need all three? Gmail and Yahoo ask bulk senders for SPF, DKIM and DMARC. Even small shops reach the inbox more reliably with all three. ## Sources - [S1] Google Workspace Admin Help: Email sender guidelines: (checked 2026-11-06)