If you've ever had email performance dip for "no obvious reason," you already know the pain: support tickets rise, campaign results flatten, and your team starts digging through DNS records under pressure.
The hard part is that most domain issues don't fail loudly. They drift. A DMARC policy gets weakened. SPF changes stop including the right sender. MX records become inconsistent across environments. Nothing looks catastrophic until deliverability starts to wobble.
That's exactly why this endpoint exists.
With , you can set up continuous checks for your domain's baseline sending posture and stop relying on occasional manual audits.
Why this matters for real teams
A solid domain monitoring setup helps you:
- catch DNS regressions before they impact campaigns
- keep sender reputation healthier over time
- reduce reactive incident work
- build confidence when shipping DNS or infrastructure changes
In plain terms: you move from "we hope this is fine" to "we know this is healthy right now."
Naming and ownership (small detail, big payoff)
When you create monitors, use names that make ownership obvious. Good names reduce time wasted during incidents.
Examples:
If you have multiple environments, include environment in the name. It prevents "we fixed staging" mistakes when production is the thing on fire.
A practical setup that works
When teams are starting out, this pattern is simple and effective:
- Create one monitor per sending domain.
- Start with a 5-minute interval for high-impact domains.
- Keep scheduling enabled by default.
- Use manual run-now checks immediately after DNS edits.
You can do all of this in UI later, but the API gives you a clean automation path from day one.
What the monitor checks (and why)
Domain monitoring is most useful when it focuses on the auth and routing signals that actually break sending:
- SPF presence and validity (including drift that accidentally excludes a sender)
- DMARC presence and policy strength
- MX availability and obvious routing mistakes
This is not the full deliverability picture (inbox placement is separate), but it catches the regressions that frequently precede deliverability problems.
Endpoint
Minimal request example
cURL example
Start simple
Domain monitoring is one of those controls that feels optional until the week you really need it. Starting with continuous SPF/DMARC/MX checks is a low-effort way to protect a high-impact channel.
If you want predictable deliverability, this is the right first step.