Email Checker — verify your authentication right now
Send a real email to a one-time address and get back SPF/DKIM/DMARC results, blacklist status, and basic content flags — for business email addresses only.
How it works
Three steps, no account required.
01
Grab an address
The moment you land here, we set aside a disposable inbox just for this test — nothing to type, nothing to sign up for.
02
Mail it from wherever you send from
Fire off a normal email to that address from your own domain's mail system, then tell us you've sent it.
03
Read the verdict
We inspect exactly what a real receiving mailbox saw — authentication, reputation, and wording — and hand you a plain 0-100 readout.
What is a spam score?
Your spam score is a 0–100 rating of how likely your email is to reach the inbox instead of the spam folder. It's calculated from SPF/DKIM/DMARC results and alignment, blacklist status, and a few content signals — with the exact checks shown alongside your result, not hidden behind a single number.
Exception: if SPF, DKIM, or DMARC outright fails, the result always shows as High risk regardless of the numeric score — a single failed core authentication check alone can send mail to spam.
High risk
Multiple checks failed here — mail like this routinely gets buried or bounced until those are fixed.
At risk
Nothing's failing outright, but there's enough weighing against you that some of this mail is probably landing in spam.
Mostly solid
The fundamentals check out — a few smaller items below are worth tidying up for full confidence.
Excellent
Nothing flagged anywhere we looked — this is what a trustworthy, well-configured sender looks like.
Email, IP & domain blacklists
Every test looks up the IP that actually sent your email against major DNS-based blacklists — a listing on any one of these alone is enough to route otherwise well-authenticated mail straight to spam.
Sending IP
cross-checked against multiple reputation databases
Clean
no negative signal — mail proceeds on its own merits
Flagged
counts against you, regardless of how well-authenticated the mail is
More free email tools
Each tool opens in a new tab with a plain-English explanation of what it checks, why it matters, and the live tool itself — no signup required.
What we're building next
These aren't live yet — no fabricated results, just what's on the roadmap.
Inbox placement test
Confirm whether your email lands in the primary inbox, promotions, or spam across Gmail, Outlook, Yahoo, and more — not just whether authentication passed.
AI eye-tracking heatmap
See precisely which parts of your email draw attention first, so you can put your CTA where readers actually look.
Email preview across 50+ clients
Catch a broken layout or an invisible dark-mode logo before you send, across real desktop, web, and mobile mail clients.
Scheduled monitoring
Schedule this test to run automatically on a cadence and get alerted the moment your placement rate starts slipping.
Accessibility checker
Check your email against WCAG rules — color contrast, alt text, heading order, and dark-mode rendering.
Built for every kind of send
Transactional email that has to land
Receipts, password resets, signup confirmations — catch placement issues before support tickets pile up.
Cold outreach & marketing sends
A single filter change at a major provider can cut your reply rate in half before you notice. Test before every send.
IP and domain warm-up
Watch your authentication posture hold up as you ramp sending volume on a new domain or IP.
Business and consumer inboxes
Test against both — if your audience is B2B, you need to know how their actual corporate mail stack treats your mail, not just Gmail.
Frequently asked questions
Want this running continuously, not just once?
ESPM monitors DMARC, SPF, and DKIM across every domain you own and alerts you the moment something changes. Free demo mode, no credit card required.