📧 Email Deliverability Checker

Check SPF, DKIM, DMARC, MX records and reverse DNS. Find out why your emails land in spam.

TL;DR:

Email deliverability checker validates MX records, SPF, DKIM, DMARC, open relay status, and blacklist listings (Spamhaus, Barracuda, SORBS). Shows whether mail servers are accepting, whether authentication is correct, and whether reputation issues exist. Critical for marketing and transactional email.

SPF + DKIM + DMARCFull email protection triad check

Antispam StatusBlacklist check

MX ConfigurationCorrect mail server configuration

Email ScoreEmail deliverability score

Why teams trust us

MX record check

SMTP

SMTP verification

SPF

SPF + DKIM + DMARC

Free

no signup

How it works

Enter email address

Check MX + SMTP

Get validity verdict

Why check email settings?

Proper SPF, DKIM, and DMARC configuration directly impacts email deliverability. Without these records, your emails land in spam or are rejected before delivery.

SPF Check

SPF record correctness: syntax, allowed server list, fail mechanism.

DKIM Analysis

Presence and validity of DKIM signature for the specified selector.

DMARC Policy

DMARC record parsing: policy, rua/ruf reports, SPF and DKIM alignment.

Email Score

Numerical delivery readiness score with improvement recommendations.

Who uses this

Email marketers

mailing list verification

Developers

registration validation

Sales

CRM contact check

Sysadmins

mail delivery troubleshooting

Common Mistakes

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Missing SPF recordWithout SPF, emails from your domain are treated as potential spoofing.

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SPF with ?all instead of -all?all means "neutral" — that's not protection. Use -all.

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DMARC without policyp=none only collects reports. Move to p=quarantine or p=reject.

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Not reading DMARC reportsDMARC generates reports on all emails. Analyze them to find unauthorized sending.

Best Practices

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Deploy SPF → DKIM → DMARC sequentiallySPF first, then DKIM, then DMARC. Each step must work before moving to the next.

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Start DMARC with p=noneCollect reports for 2–4 weeks, ensure all legitimate mail passes, then tighten policy.

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Add rua report addressrua=mailto:dmarc@yourdomain.com — receive weekly aggregate reports.

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Check after changing providerWhen changing hosting or ESP, always update SPF and DKIM keys.

Get more with a free account

Email check history and API keys for service integration.

Email Deliverability — What is Checked?

SPF (Sender Policy Framework) prevents email spoofing by listing authorized mail servers. DKIM (DomainKeys Identified Mail) adds a cryptographic signature. DMARC (Domain-based Message Authentication, Reporting and Conformance) specifies what to do with emails that fail SPF/DKIM. MX records define which servers accept email for the domain.

Learn more

Related guides

Longer-form reading on this topic from the knowledge base.

Email deliverability monitoring

Alerts on MX / SPF / DKIM / DMARC changes — guard against silent email infrastructure breakage.

Set up monitoring