A growing toolbox for diagnosing and fixing email authentication. Generate a DMARC record, look up the live DMARC and SPF records for any domain, or get a free plain-English configuration report - no account required.
Build a ready-to-paste DMARC TXT record with the right policy, alignment, and reporting options for your domain.
Look up the live DMARC and SPF DNS records for any domain, with a plain-English breakdown of each tag.
Validate your SPF record against RFC 7208 lookup limits, then build a clean, flattened policy you can paste straight into DNS.
Look up a domain's DKIM selector and check the published public key — is it valid, strong (2048-bit or more), and out of testing mode?
Get a free, plain-English DMARC, SPF, and DKIM configuration report for your domain, delivered to your inbox.
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These free tools give a point-in-time view. OnlyDMARC watches your domains around the clock and alerts you the moment something changes.