About spfdkimdmarc.com

spfdkimdmarc.com is a free tool to check and fix the three DNS records that decide whether your email is trusted: SPF, DKIM and DMARC.

Who is behind it

The site is built and maintained by a Linux systems engineer with more than ten years of experience running servers, DNS and email for agencies and their clients. Most of the problems covered in the guides, such as duplicate SPF records, website mail failing DMARC or DKIM keys published under the wrong name, come from real support tickets.

How the checker works

The checker runs entirely in your browser. It reads your public DNS records through DNS-over-HTTPS (Cloudflare's resolver, with Google Public DNS as a fallback) and builds the records from the options you choose. There is no account, no server-side processing and nothing is stored.

Where the values come from

Every provider value (SPF includes, DKIM selectors, console paths) is taken from that provider's official documentation, linked at the bottom of each guide. Providers change their interfaces from time to time: if something on this site no longer matches what you see, trust your provider's admin console.

Independence

This site is independent and is not affiliated with Google, Microsoft, Zoho, OVHcloud or any email provider. Product names belong to their owners.