Free Tool

Sender reputation monitor

Check your domain and IP reputation across major providers and reputation services. Monitor scores that determine inbox placement.

Leave blank to auto-detect from domain's MX records

What It Does

Monitor your sender reputation across the systems that matter. Check your domain and sending IPs against Google Postmaster, Microsoft SNDS, Talos, Spamhaus, and other major reputation services.

See your reputation scores, blacklist status, complaint rates, and spam trap hits—all the factors ISPs use to decide inbox vs spam.

Why It Matters

Reputation is everything in email. High reputation = inbox. Low reputation = spam. Most senders have no idea what their reputation score actually is until deliverability crashes.

This monitor shows exactly how ISPs view you, giving early warning of reputation damage before it kills your campaigns.

Key Features

Multi-provider reputation lookup
Google Postmaster Tools integration
Microsoft SNDS score checking
Spamhaus DBL/PBL lookup
Talos Intelligence check
Complaint rate monitoring
Spam trap detection
Historical trending

How To Use

  1. 1Enter your sending domain
  2. 2Enter your sending IP address(es) (optional)
  3. 3Click "Check Reputation"
  4. 4Review reputation scores by provider
  5. 5Check blacklist status
  6. 6Review complaint rates
  7. 7Monitor trends over time

Reputation Issues

  • Low sender score (below 70)
  • High complaint rate (above 0.1%)
  • Spam trap hits detected
  • Blacklist listings
  • Missing or broken authentication
  • Sudden reputation drops
  • High bounce rates

Best Practices

  • Check weekly during active sending
  • Connect Google Postmaster Tools for detailed data
  • Register for Microsoft SNDS access
  • Monitor trends, not just snapshots
  • Investigate sudden reputation drops immediately
  • Keep complaint rate under 0.1%
  • Warm new IPs slowly (don't spike)