Postscale Check · free
DMARC check
Inspect your domain’s DMARC policy, reporting addresses, and alignment settings. Review suggested next steps.
Understanding DMARC policies
DMARC enforcement comes in three levels: p=none (monitor only), p=quarantine (send suspicious mail to spam), and p=reject (bounce at SMTP). Review legitimate sending sources and authentication failures before changing policy.
For a step-by-step on the transition, see our 2026 authentication guide and the DMARC report parsing post.
Need this in production?
The free tool is great for one-off checks. For automated monitoring, alerting, and an API, see the related Postscale product.
See the DMARC Reporting API