Free tool
Email deliverability checker
Enter a domain and see, in seconds, whether its email is set up to reach the inbox. We check SPF, DMARC, DKIM and MX and score it 0-100 — with exactly what to fix.
Checks public DNS only. DKIM uses common selectors — a custom selector may not be detected.
Why these four records decide the inbox
A cold or marketing email can be perfectly written and still land in spam if the sending domain isn't authenticated. SPF lists who may send for your domain, DKIM cryptographically signs your mail, DMARC tells receivers what to do when checks fail, and MX shows the domain can receive replies. Get all four right and receivers treat you as a legitimate sender — the single biggest lever on deliverability.
Frequently asked questions
What does the deliverability checker test?
It reads your domain's public DNS and checks the four records that decide whether cold and marketing email lands in the inbox: SPF, DMARC, DKIM and MX. You get a 0-100 score and a specific fix for anything weak.
Is it free?
Yes — free and no signup. The check runs in your browser against public DNS.
Why does deliverability matter for cold email?
Even a perfect message fails if the sending domain isn't authenticated. SPF, DKIM and DMARC tell receivers your mail is legitimate; without them, campaigns land in spam and burn the domain.