Free tools · Reputation
IP & domain blacklist checker.
Is your server, domain or mail server on a spam or malware blacklist? Ten public lists, checked at once.
FreeRead-onlyNo sign-up
Design preview · example results, not a real check of this address
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The full Safety Check grades encryption, browser protection, sessions, attack filtering, AI agents, software, third parties, email and reputation, and shows exactly which gaps SENTRA closes.
Questions
What you should know.
Why would my IP be blacklisted?
Usually because the server, or another one on the same address, sent spam or hosted malware, often after a compromise you didn't notice.
What does a listing cost me?
Your email bounces or lands in junk, and some security products warn visitors away from your site.
How does SENTRA help?
SENTRA checks every list daily and alerts you on the first listing, and SENTRA AI SHIELD blocks the attacks that usually cause one.