Email Security & Testing Tools
A full suite of diagnostic tools for developers, cybersecurity researchers, and privacy-conscious internet users. 100% free with zero registration.
Email Address Validator
Validate any email address against RFC 5321 formatting syntax, check top-level domain DNS existence, verify MX records, and score deliverability from 0 to 100.
Spam Score Checker
Paste your email subject and body copy to receive an instant Google Gemini AI spam risk analysis (0–100), detected trigger flags, and 5 actionable suggestions.
Email Header Analyzer
Parse raw RFC 822 email headers to verify cryptographic SPF, DKIM, and DMARC authentication policies, examine hop latency, and trace originating mail relays.
Disposable Email Detector
Instantly check if any domain or email address belongs to a temporary, burner, or disposable mail provider against our comprehensive database of 120+ services.
Deliverability Inbox Tester
Send real test emails to an assigned disposable target inbox to measure delivery latency, test HTML email client rendering, and inspect SPF/DKIM parameters live.