REPUTATION TOOL
IP Blacklist Check
Check if your IP address — or any IP/domain — is listed on email blacklists (DNSBLs). Listings can quietly block your outgoing mail.
Check your IP reputation
Look up your IP across major email blacklists (DNSBLs). Nothing is stored.
What is an IP blacklist?
A DNS blacklist (DNSBL or RBL) is a live database of IP addresses known for sending spam or malicious traffic. Mail servers query these lists in real time and may reject or quarantine email coming from a listed IP.
If you run a mail server or send newsletters, a listing can silently hurt deliverability. Home and mobile IPs are dynamic and shared, so they can occasionally appear on aggressive lists through no fault of your own. We query the public lists live and store nothing.