MailConfigLab

Email deliverability for a more open internet

Check Your Email Deliverability, Authentication & Domain Health

Instantly analyze your domain's SPF, DKIM, DMARC, MX, BIMI, MTA-STS and more.

Get clear diagnostics and actionable recommendations for your email infrastructure.

Preview release: live scanning is not available yet.

Scanning engine in preparation. Demo reports are available below.

View Demo Report →
No signup required for demoDNS-based checks plannedClear recommendations
Domain Health ReportDemo Data

example.com

92/ 100

Great! Your domain looks healthy.

Illustrative result — not a live domain check.

SPFPass
DKIMPass
DMARCPass
MXPass
BIMIWarning
MTA-STSPass
TLS-RPTPass
View Full Report
SPF DKIM DMARC MX BIMI MTA-STS TLS-RPT

The toolkit

All the tools you need for email deliverability

Powerful, easy-to-use tools to check, troubleshoot and improve your email infrastructure. Currently in preparation.

Domain Health Check

A unified view of your email authentication setup.

Coming soon

SPF Checker

Understand which senders your domain authorizes.

Coming soon

DKIM Checker

Inspect signing records and selector configuration.

Coming soon

DMARC Analyzer

Understand policy and alignment requirements.

Coming soon

MX Lookup

Review the servers that receive your email.

Coming soon

BIMI Inspector

Explore brand indicator prerequisites.

Coming soon

MTA-STS Validator

Review transport security policy requirements.

Coming soon

Blacklist Check

Investigate reputation signals in context.

Coming soon

Deliverability Audit

Bring authentication evidence into one report.

Coming soon

More Tools

Explore the upcoming email infrastructure toolkit.

Coming soon

Why teams choose MailConfigLab

Our design principles — built around evidence, not unexplained scores.

Clear pass/fail diagnostics

See the outcome and the evidence behind it.

Actionable recommendations

Understand what to change and why it matters.

Fast DNS-powered checks

A focused workflow for public DNS records.

Provider comparison

Find the trade-offs relevant to your setup.

Technical explanations

Learn the protocol behind each finding.

Team-ready reports

A report structure designed for shared decisions.

Sample report

A closer look at your domain's health

Every finding will explain the issue, severity, evidence and recommendation. This preview uses illustrative data only.

Explore Demo Report
example.comDemo Data
92/ 100 · Sample score

6 Pass 1 Warning 0 Fail

Authentication Records
Illustrative authentication summary
RecordStatusInterpretation
SPFPassSample finding only
DKIMPassSample finding only
DMARCPassSample finding only
MXPassSample finding only
BIMIWarningSample finding only
MTA-STSPassSample finding only
TLS-RPTPassSample finding only
Issues & Recommendations

Sample BIMI warning: review the logo and certificate requirements of your receiving providers.

DNS Details

No live DNS request was made. Records will appear here when the engine is connected.

Popular email providers

Provider-specific guidance is coming. Names identify providers, not partnerships or endorsements.

Google Workspace

Provider guide planned

Microsoft 365

Provider guide planned

Amazon SES

Provider guide planned

SendGrid

Provider guide planned

Mailgun

Provider guide planned

Resend

Provider guide planned

Postmark

Provider guide planned

Start scanning your domain today

Explore the demo while our live scanning engine is being prepared.

Scanning engine in preparation. Demo reports are available below.