Open-Source DMARC Diagnostics & Analytics
MailMARC helps you see why email auth fails and how to fix it — fast. Rust backend. Clean Tailwind UI. No per-domain fees.
DMARC, SPF, DKIM
Live diagnostics
Threat intel-ready
MailMARC helps you see why email auth fails and how to fix it — fast. Rust backend. Clean Tailwind UI. No per-domain fees.
Not just charts — real answers and fix-paths.
Pinpoint SPF/DKIM/DMARC failures with plain-English guidance.
Compliance trends, source reputation, geo distribution, volume.
Plug in Tor exits, AbuseIPDB, Spamhaus, URIBL/SURBL when you want.
Rust API + clean UI. No black boxes. Self-host or extend freely.
Process DMARC aggregate reports, group by source IP, resolve hostnames, cache results.
Identify alignment failures, missing signers, and misconfigurations with fix recipes.
Use built-in tools to generate/validate DNS records and track progress to reject.
Create correct records quickly (rua, ruf, pct, sp, fo, adkim, aspf…)
Mechanisms, includes, lookup counter, provider templates.
Keypairs, selectors, rotation tips, DNS formatting.
Enforce TLS for mail transport with confidence.
Provider detection, priorities, propagation view.
DNSBL/URIBL checks, confidence scoring, delist links.
A quick look at the dashboard, diagnostics, and tools.
Free to use, self-host, and extend. Issues and PRs welcome. Star the repo to support the project.
View on GitHubYour data stays yours. MailMARC can run entirely on your infrastructure. No opaque data processing or surprise fees.
Security notesSPF-only can be valid, but DKIM adds resilience and improves deliverability. MailMARC highlights both.
No. It’s open source. If it saves you time or money, consider donating or sponsoring.
Yes. You can enable Tor exit lists and third-party feeds like AbuseIPDB or Spamhaus with your own keys.
Self-host today. A managed option may arrive later for teams who want zero ops.
Deploy MailMARC in minutes. No per-domain fees. Full control.
MailMARC is free and open source, supported by our community. A huge thanks to our sponsors who help keep the project alive.
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