Free Toolkit
Domain Reputation Checker
Get a deliverability score for any domain in seconds — SPF, DMARC, MX, reverse DNS, blacklist status, and BIMI all in one report.
6 Signals
SPF, DMARC, MX, reverse DNS, blacklist status, and BIMI — the six dimensions that email providers use to judge your domain.
Letter Grade
Your domain gets an A–F score based on its deliverability posture, with a prioritised list of fixes.
One Click
All checks run in parallel using live DNS queries. No API key, no account, no waiting.
Maintain a strong reputation automatically
Mailflo monitors your sending infrastructure, alerts you to blacklistings, and guides your warm-up — so your reputation stays healthy between checks.
See Mailflo plans