Email Deliverability Checker

An email deliverability checker tells you whether your emails will reach the inbox or get blocked. It scans your domain’s SPF, DKIM, DMARC, MX records, and blacklist status, then shows you exactly what to fix. Hunter’s checker runs in seconds and requires no signup.

Enter your sending domain into the checker above and click Check domain. You get a full authentication scan covering SPF, DKIM, DMARC, MX records, blacklist status, and overall DNS health in under 10 seconds, with specific recommendations for each issue found.

Yes, completely free with no limits. You can check any domain, as many times as you want, without creating an account or entering a credit card. If you want continuous monitoring across multiple sending domains, you can create a free Hunter account.

SPF (Sender Policy Framework) is a DNS record that lists which mail servers are authorized to send emails on behalf of your domain. Without it, anyone can forge emails using your domain name. Inbox providers check SPF as a first line of defense, and a missing or broken record is one of the most common reasons emails land in spam.

DKIM (DomainKeys Identified Mail) adds a cryptographic signature to every outgoing email. The receiving server checks this signature against a public key in your DNS to confirm the message wasn't tampered with in transit. If your DKIM key is missing or misconfigured, inbox providers treat your emails as unverified, which hurts inbox placement.

DMARC (Domain-based Message Authentication, Reporting and Conformance) tells inbox providers what to do when an email fails SPF or DKIM checks. You need it. Without a DMARC policy, failed checks have no consequence, leaving your domain open to spoofing. A reject or quarantine policy gives inbox providers confidence that your domain is protected.

Start with authentication: configure SPF, DKIM, and DMARC correctly. Then use a dedicated sending domain, warm up new accounts gradually, keep daily sending volume under 50 emails per account, and verify your contact list with the Email Verifier to keep bounces low.

A good score means all core authentication records (SPF, DKIM, DMARC) are valid and properly configured, your domain is not on any major blacklists, and your MX records route mail correctly. You see exactly what passes and what needs attention, broken down by individual check.

Run a check before launching any new campaign in Sequences and after making DNS changes. If you send outreach regularly, a monthly check catches configuration drift before it affects results.

Yes. If your authentication is broken, inbox providers may route your emails to spam or block them outright. No amount of subject line testing or copy editing helps if emails never reach the inbox. Fix authentication first, then focus on content.

An email deliverability checker tests whether your sending domain is properly configured to reach inboxes (DNS records, blacklists, authentication). Email verification checks whether a specific email address is valid and won’t bounce. You need both. Use this tool for your domain and the Email Verifier for individual addresses.

The most common causes are missing or broken SPF, DKIM, and DMARC records, domain blacklisting, high bounce rates from unverified addresses, and aggressive sending volumes from a single account. Sending 20–40 emails per day per account is the sweet spot for both deliverability and reply rates. Content-level triggers like spammy language and excessive link tracking also play a role.