IP Reputation Basics
Inspect PTR, forward-confirmed reverse DNS and DNSBL signals for mail-server IPs.
Live check · No account required · Results depend on the DNS resolver and network access available to this hosting server.
ABOUT THIS TOOL
What IP reputation basics are checked
Mail reputation is influenced by many external and historical signals. SkullCheck focuses on observable infrastructure basics: reverse DNS, forward-confirmed reverse DNS and selected DNSBL responses for public mail-server addresses. These signals are diagnostic indicators, not a universal reputation score.