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.

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.

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

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.