Free Email Checker Ongoing Monitoring
Domain Deliverability Monitor
Free ongoing domain deliverability monitoring – daily SPF, DMARC, BIMI, MX and blacklist checks for your verified domain, with an alert email the moment something breaks.
Want unlimited checks?
Get started free – no card needed, 5 more checks the moment you verify your email.
From a one-time check to ongoing monitoring
Every other tool on this site answers a single question at a single moment: is this domain's SPF valid right now? Deliverability problems rarely announce themselves – a DNS change from a colleague, an expiring certificate, or a new DNSBL listing can silently break delivery for days before anyone notices open rates dropping. This tool checks a verified domain automatically, every day, and surfaces the change the day it happens.
What gets checked daily
- SPF and DMARC records – the two authentication checks every major inbox provider now expects.
- BIMI – shown as an opportunity rather than a failure, since adoption is still optional.
- MX records, so a broken mail route is caught immediately.
- Major public blacklists (DNSBLs), the same list used by this site's standalone blacklist checker.
How ownership is verified
A 6-digit code is emailed to an address at the domain being monitored – the same proof-of-control model used by the domain claim tool. Monitoring can be paused or resumed at any time from the same panel.
Frequently Asked Questions
How is this different from the SPF/DKIM/DMARC checker?
That tool answers "what is true right now" for any domain, for anyone. This one is scoped to a domain you have verified you control, checks it automatically every day, and emails you the moment something regresses – so a broken record gets caught the same day, not whenever someone happens to run a manual check again.
Do I need to verify my domain again if I already claimed it?
Yes – a fresh one-time code is required to start or manage monitoring, the same proof-of-control check used by the domain claim tool, kept separate so an old claim link can never be replayed to change your monitoring settings.
What happens when something breaks?
The affected component turns red on your dashboard and an alert email goes to your verified address, at most once every few hours per domain so a flapping record does not spam your inbox.
Is a missing BIMI record treated as a failure?
No – BIMI is still an emerging standard, so a missing record shows as a yellow "opportunity" rather than a red failure and never triggers an alert on its own.