Check if your IP or domain is on major email blacklists
Free Blacklist Checker
Check Your IP Reputation
Instantly check if your IP address or domain is listed on major email blacklists. Identify deliverability issues before they impact your campaigns - no signup required.
Enter an IP address or domain
Getting Started
How to Use This Tool
Enter Your IP Address or Domain
Type your sending IP address (e.g., 192.0.2.1) or domain name (e.g., example.com) into the input field. If you are unsure of your sending IP, check with your email service provider or IT team.
Click "Check"
Hit the check button and the tool will query multiple blacklist databases simultaneously. Results typically appear within a few seconds.
Review Your Blacklist Status
You will see a clear result for each blacklist checked — either "clean" (not listed) or "listed" (blacklisted). If you are listed, the tool shows which blacklists flagged you so you can take targeted action.
Understanding Results
How to Interpret Your Results
Clean / Not Listed
Your IP or domain was not found on that particular blacklist. This is the ideal status — it means that blacklist is not blocking your emails.
Listed / Blacklisted
Your IP or domain appears on that blacklist. Not all blacklists carry the same weight. Being listed on a major blacklist like Spamhaus SBL is far more damaging than a listing on a less commonly used list.
Severity Varies by Provider
Spamhaus, Barracuda, and SpamCop are among the most impactful. If you are listed on one of these, prioritize delisting immediately. Listings on smaller or regional blacklists are less urgent but should still be resolved.
Multiple Listings
If you see multiple listings across different blacklists, this usually indicates a systemic issue — such as a compromised sending server, spam complaints, or sending to a large number of invalid addresses. Address the root cause before submitting delisting requests, or you risk being re-listed quickly.
Learn More
What Are Email Blacklists?
Email blacklists are databases maintained by security organizations that track IP addresses and domains known to send spam, malware, or other unwanted email. They serve as one of the internet's primary defense mechanisms against email abuse, and they play a central role in determining whether your emails reach the inbox or get blocked.
When you send an email, the receiving mail server often checks the sending IP address against one or more blacklists before accepting the message. If the IP is found on a blacklist, the server may reject the email outright, route it to the spam folder, or assign it a higher spam score. This happens before any content analysis takes place, making blacklist status one of the first and most critical gatekeepers of email deliverability.
IP addresses typically end up on blacklists for several reasons: sending a high volume of unsolicited email, receiving too many spam complaints from recipients, hitting spam traps (email addresses specifically set up to catch spammers), having a compromised server sending spam without the owner's knowledge, or sending to a large number of invalid addresses. Even legitimate senders can be blacklisted if they have poor list hygiene or a sudden spike in sending volume.
The major blacklist providers include Spamhaus, which maintains multiple lists including the SBL (Spamhaus Block List) for known spam sources and the XBL for compromised systems; Barracuda, which maintains the BRBL used by many corporate email filters; SpamCop, which relies on user-submitted spam reports; and SORBS, which tracks a variety of email abuse indicators. Each organization uses different criteria and has different delisting procedures.
The impact of a blacklisting on your email deliverability can range from minor to catastrophic depending on which list you appear on and who queries it. A Spamhaus listing can block your email across millions of mail servers, while a listing on a smaller regional list may only affect a fraction of your recipients. Regular monitoring is essential to catch listings early and minimize the damage to your sender reputation and email marketing performance.
Common Questions
Frequently Asked Questions
What is an email blacklist?
An email blacklist (also called a blocklist or DNSBL) is a real-time database of IP addresses and domains that have been identified as sources of spam or malicious email. Mailbox providers and spam filters query these lists when deciding whether to accept, reject, or flag incoming messages. Being listed on a blacklist can cause your emails to be blocked or routed to spam folders across thousands of mail servers worldwide.
How do I know if my IP is blacklisted?
The easiest way is to use a blacklist checker tool like this one. Enter your sending IP address or domain and the tool will query multiple blacklist databases simultaneously, giving you instant results. Signs that you may be blacklisted include a sudden drop in email deliverability, increased bounce rates (especially 550 errors), or recipients reporting they are not receiving your emails.
Which blacklists does this tool check?
This tool checks your IP or domain against the most widely used and impactful email blacklists, including Spamhaus (SBL, XBL, PBL), Barracuda Reputation Block List (BRBL), SpamCop, SORBS, UCEPROTECT, and several others. These are the blacklists most commonly used by major mailbox providers and corporate email filters.
How do I get removed from a blacklist?
Each blacklist has its own delisting process. Most require you to visit their website, look up your IP or domain, and submit a removal request. Before requesting removal, you must identify and fix the underlying issue that caused the listing - such as a compromised server, spam complaints, or poor list hygiene. Some blacklists like SpamCop automatically delist IPs after the spam activity stops, while others like Spamhaus require a manual request.
Can a shared IP get me blacklisted?
Yes. If you send email through a shared IP address (common with shared hosting or some email service providers), another sender on that same IP can get the entire IP blacklisted, affecting your deliverability as well. This is one of the main reasons high-volume senders opt for dedicated IP addresses. If you are on a shared IP and experience blacklist issues, contact your email service provider - they are responsible for managing the reputation of their shared IP pools.
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