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Start with a health check

Email Health Check & Deliverability Tools

Enter a domain to check its email configuration, authentication and reputation.

Check your email domain, DNS, SPF, DKIM, DMARC, MX records and blacklist status.

MXSPFDKIMDMARCBlacklistSMTPPTRMTA-STSBIMI

Get an Email Health Score with clear guidance on what to fix.

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Popular Email Tools

Start with the tools most people need to diagnose email problems.

Email Health Check
Get an overall health score for your domain's email setup.
Email Deliverability
Analyze authentication, reputation and DNS for better inbox placement.
Email Blacklist Checker
Check if your domain or IP is listed on major blacklists.
Email Header Analyzer
Paste email headers to trace the delivery path and authentication results.
SPF Checker
Check and validate your domain's SPF record.
DKIM Checker
Verify DKIM signatures for your domain.
DMARC Checker
Check and analyze your domain's DMARC record.
MX Lookup
Look up mail exchange records for a domain.

Email Authentication Tools

Validate and configure SPF, DKIM and DMARC to stop spoofing and improve deliverability.

SPF Checker
Validate SPF records to prevent email spoofing.
DKIM Checker
Verify DKIM signatures and email authentication.
DMARC Checker
Check and analyze DMARC records and policies.
SPF Generator
Generate an SPF record for your domain.
DMARC Generator
Build a DMARC record with the right policy.
BIMI Checker
Check Brand Indicators for Message Identification.
MTA-STS Checker
Check MTA Strict Transport Security policies.

Email Deliverability Tools

Find out why emails go to spam and improve inbox placement.

Email Deliverability
Comprehensive deliverability and inbox placement analysis.
Email Blacklist Checker
Check your domain and IP across major blacklists.
IP Blacklist Checker
Check if your IP address is listed on DNSBLs.
Domain Blacklist Checker
Check if your domain is listed on blacklists.
Email Header Analyzer
Analyze headers to find delivery problems.
SMTP Test
Test SMTP server connectivity and authentication.

DNS & Email Infrastructure

Look up the DNS records that control where and how your email is delivered.

MX Lookup
Check mail exchange records for a domain.
DNS Lookup
Query all common DNS record types.
DNS Propagation
Check DNS propagation across global nameservers.
PTR/rDNS Record Lookup
Reverse DNS lookup for IP addresses.
SMTP Test
Test SMTP server connectivity and authentication.

Email Guides

Learn how to fix deliverability problems, read email headers and secure your domain.

Why is my email going to spam?
Learn about common reasons why emails end up in spam folders and how to fix them
How to set up SPF records
Complete SPF record setup guide, including syntax explanation and best practices
How to fix DMARC failure issues
Analyze DMARC validation failures and step-by-step solutions
Email Header Analysis Guide
Use headers to debug SPF/DKIM/DMARC results.
Blacklist & Health Check Workflow
Check blacklist status and overall email health regularly.
How to Pass Gmail Spam Filter (2025)
Modern requirements to avoid Gmail spam with authentication and content best practices

Professional Email Tools

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

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.