Free Email Blacklist Checker
Checks against major blacklist providers with specific delisting instructions.
What This Tool Checks
This email blacklist checker scans your sending domain and IP address against major blacklist databases that email providers reference when deciding whether to deliver your messages. Being listed on even one major blacklist can cause a significant portion of your emails to be blocked or routed to spam. A regular blacklist check is essential for any cold email sender because listings can happen without warning and the impact on deliverability is immediate.
The checker queries Spamhaus (SBL and DBL), Barracuda (BRBL), SpamCop, SORBS, and other widely referenced blacklists. Each result shows whether your domain or IP is listed, which specific list or zone you appear on, and the relative impact of that listing on your email deliverability. Not all blacklists carry equal weight. A Spamhaus listing affects deliverability far more than a smaller, less referenced list.
Why Blacklist Monitoring Matters
Immediate Deliverability Impact
When your domain or IP is added to a blacklist, email providers that reference that list immediately start blocking or spam filtering your messages. The effect is not gradual. It is a switch that flips. Your open rates drop, bounce rates spike, and campaigns that were performing well suddenly stop working. Running a domain blacklist lookup regularly catches listings early when the impact window is shorter and removal is simpler.
Shared Infrastructure Risk
If you send through shared IP addresses, another sender's behavior can get the shared IP blacklisted, affecting your deliverability even though you did nothing wrong. An ip blacklist check helps you identify whether a deliverability drop is caused by your own sending or by a shared IP issue. This is especially important for senders who use platforms with managed sending pools.
What to Do If You Are Listed
Prioritize by Impact
If the checker finds listings, address the highest impact blacklists first. Spamhaus is referenced by the largest number of email providers and should be your first priority. Barracuda and SpamCop are next. Each blacklist has its own removal process. Spamhaus requires you to identify and fix the root cause before they will delist. Barracuda offers a self service removal form. SpamCop listings expire automatically within 24 to 48 hours if no new spam reports are received.
Fix Before Requesting Removal
Before requesting delisting, identify what caused the listing: high bounce rates, spam complaints, spam trap hits, or compromised sending accounts. Fix the underlying problem first. Blacklist operators track repeat offenders, and requesting removal without addressing the cause often leads to faster relisting and longer listing durations.
Related Tools
Blacklist status is one component of your overall sending health. For a complete picture, also check your DNS authentication using the SPF Checker, DKIM Checker, and DMARC Checker. For email content analysis, use the Spam Checker.
Automated Blacklist Monitoring
Manual blacklist checks are useful but depend on you remembering to run them. EmailQo includes automated blacklist monitoring as part of its pre send inbox health checks. Before every campaign send, the system checks your sending domains against major blacklists. If a listing is detected, the check flags it before your emails go out. This catches listings within hours rather than discovering them days later through declining open rates. Every EmailQo plan includes this monitoring alongside DNS validation, content scanning, and enterprise filter simulation.