Features
Start with a single test, then keep your email healthy over time — see who's sending as you, catch breakage before your recipients do, and drive it all from your own systems.
Send any message to a unique test address and get a score out of 10 in seconds — SPF, DKIM, DMARC, blocklists, a full spam engine, content, and links — each with the evidence and the exact fix. No account needed to start, and every result is a shareable report.
Run a free test →Point your domain's DMARC rua at DeliverSight and we ingest, parse, and chart your aggregate reports — so you can finally see who is sending as your domain, which sources pass or fail authentication, and whether it is safe to move your policy to quarantine or reject.
Start aggregating →We keep watch on your domains' SPF, DKIM, DMARC, MX, TLS/MTA-STS, certificate expiry, and blocklist status on a schedule, detect changes and open incidents, and alert you — email, in-app, or Slack / Teams / Telegram — the moment something breaks, instead of your customers finding out first.
Monitor a domain →Create tests from CI or your own systems, read the scores back over a clean REST API, and receive a signed webhook the moment a test lands, a monitor fires, or a new sending source appears in your DMARC data. Automate deliverability into your release pipeline.
Read the API docs →