Free Email Tools
Analyze, diagnose, and improve your email infrastructure with tools built by deliverability experts.
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Authentication & DNS
Verify your domain's email authentication setup and DNS records.
DMARC Report Analyzer
Upload DMARC aggregate XML files and see which sources are authenticated, need attention, or may be spoofing your domain.
FreeDMARC Record Generator
Create your DMARC record in under 2 minutes. Answer 5 questions and get a ready-to-copy DNS record.
FreeDMARC Record Checker
Check any domain's DMARC record. Validate the policy, alignment settings, and reporting configuration.
FreeSPF Record Checker
Validate any domain's SPF record. Count DNS lookups against the 10-lookup limit and identify authorized services.
FreeMTA-STS & TLS-RPT Checker
Check your MTA-STS policy and TLS reporting setup. Validate DNS records and policy file configuration.
Reputation & Monitoring
Monitor your sending reputation and decode email internals.
Email Blacklist Checker
Check if your domain or IP is listed on 12+ major blacklists including Spamhaus, Barracuda, and SpamCop.
FreeEmail Header Analyzer
Paste email headers or upload an .eml file to see what every header means in plain English.
FreeEmail Raw Source Analyzer
Paste the full raw source of any email to decode authentication, routing, tracking pixels, and spam signals.
Content & Design
Test your email content, signatures, and accessibility before you send.
Subject Line Tester
Check for spam trigger words, preview rendering across Gmail, iPhone, and Outlook, and get a deliverability score.
FreeEmail Signature Analyzer
Paste your signature HTML and check for deliverability red flags like HTML weight, image count, and link density.
FreeEmail Accessibility Checker
Check your email HTML against WCAG standards. Get scores for alt text, contrast, structure, and dark mode.