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Check if your domain or IP is listed on DNS-based blacklists (RBL/DNSBL). Identify spam filters, reputation blocks, and delivery issues instantly.
A DNS Blacklist (DNSBL or RBL — Real-time Blackhole List) is a database of IP addresses and domains known to send spam, host malware, or engage in other malicious activity. Mail servers and security appliances query these lists to block or filter incoming traffic. Being listed on a DNSBL can severely impact email deliverability, website reputation, and service availability.
If your domain or IP is blacklisted, legitimate emails bounce, website traffic is blocked, and your brand reputation suffers. Proactive blacklist monitoring is essential for any organization that relies on email or web services.
Not monitoring after IP changes, ignoring delisting procedures, failing to secure mail servers against relay abuse, and assuming a clean check means permanent safety are common oversights.
Type your domain or IP address to check.
We query major RBLs and DNSBLs simultaneously.
Each list reports whether your target is listed or clean.
Take action on any listings to restore deliverability.
Checks against major spam and reputation blacklists including Spamhaus, SORBS, Barracuda, UCEPROTECT, and more. Comprehensive coverage ensures no critical listing is missed.
For each blacklist, shows whether you are listed, the reason code if available, and how to proceed with delisting. Detailed information accelerates remediation.
Checks both domain names and IP addresses against relevant blacklists. Different lists specialize in domains vs. IPs, and we query the appropriate ones for each.
Understand your overall email and web reputation across the Internet's most trusted blacklist providers. A single listing can affect deliverability globally.
Parallel queries against all supported blacklists deliver results in seconds instead of minutes. No need to manually check each RBL individually.
Provides actionable guidance for delisting from each blacklist where applicable. Links to delisting forms and documentation when available from providers.
Automate blacklist checks, get instant alerts when your domain or IP is listed, track reputation trends over time, and receive delisting guidance notifications.