Professional Email Testing Platform

All-in-One Email Deliverability & DNS Diagnostic Tools

Free, accurate, and instant checks for DNS, SPF, DKIM, DMARC, SMTP, blacklist status, domain health & more — all in one place.

Free to use

No registration required

Instant results

Professional Email Tools

Diagnose delivery issues, configure authentication, monitor reputation, and stay compliant in one place.

Diagnose Email Delivery Issues

Quickly pinpoint problems with MX records, SMTP connectivity, and message routing.

MX Lookup

Check mail exchange records and verify email server configuration.

SMTP Test

Test SMTP server connectivity and authentication.

Email Header Analyzer

Trace message path and identify delivery issues.

Set Up SPF, DKIM, DMARC Correctly

Validate and fine-tune email authentication records to stop spoofing and phishing.

SPF Checker

Validate SPF records to prevent email spoofing.

DKIM Checker

Verify DKIM signatures and ensure email authentication.

DMARC Analyzer

Analyze DMARC policies and alignment for your domain.

Check Domain Reputation

Monitor blacklist status, domain health, and IP reputation to protect inbox placement.

Blacklist Checker

Scan major DNSBLs for your domain or IP.

Domain Health

Get an overall health score for your domain.

IP Reputation Lookup

Check if your IP is associated with spam activity.

Compliance & Validation

Ensure your email programs meet global regulations and basic address hygiene.

GDPR Checker

Review consent, data usage, and privacy controls.

CAN-SPAM

Check US commercial email compliance.

CASL

Check Canadian anti-spam compliance.

Explore All Tools

Browse by category to find exactly the deliverability, DNS, reputation, or compliance tools you need.

Deliverability Diagnostics

Delivery tests, spam analysis, and end-to-end health reports.

DNS & Authentication

DNS lookups, SPF/DKIM/DMARC validation, and policy analysis.

IP/Domain Reputation

Blacklist checks, IP scoring, and domain trust signals.

Compliance & Validation

Regulatory checks, consent flows, and address validation.