| title: "SPF & DMARC Record Lint — free online checker (no DNS lo" | |
| short_description: "Terraform block or YAML. 19 offline checks on every v=spf1" | |
| emoji: ⚙️ | |
| colorFrom: gray | |
| colorTo: yellow | |
| sdk: static | |
| pinned: false | |
| license: mit | |
| # SPF & DMARC Record Lint — free online checker (no DNS lookup needed) | |
| Paste a zone file, Terraform block or YAML. 19 offline checks on every v=spf1, v=DMARC1 and v=DKIM1 string, including the May 2026 DMARCbis changes (pct removed, np=, t=). Runs in your browser; nothing is uploaded. | |
| Runs entirely in your browser. Nothing is uploaded, nothing is stored. | |
| ## Full version | |
| Every variant of this tool, ready to download: | |
| **[getreadystack.com](https://getreadystack.com/tools/spf-dmarc-record-lint)** | |
| --- | |
| Free - MIT | |