Is Your Domain on an Email Blacklist? Find Out Instantly with Our Lookup Tool
For any business in Colombo or across the globe, email is a mission-critical communication channel. But what happens when your important messages from invoices to marketing campaigns suddenly stop reaching the inbox? The problem could be an invisible one: your domain or mail server's IP address may have been placed on an email blacklist. These real-time databases are used by email providers to identify and block suspected sources of spam, and if you're on one, your email deliverability can plummet without you even knowing.
The Blacklist Lookup tool at ToolSeel.Com is the essential diagnostic tool to check your status. At 10:07 AM on Wednesday, September 3, 2025, we offer a free and comprehensive utility that can instantly tell you if you've been listed. Simply enter your domain or IP address, and our tool will check it against dozens of the most common and influential email blacklists, giving you a clear and immediate report.
Why You Should Perform a Blacklist Lookup
Regularly checking your status is a critical part of maintaining a healthy email sender reputation.
Diagnose Email Delivery Problems: If you're experiencing high bounce rates or customers are reporting that they aren't receiving your emails, a blacklist check should be your very first step.
Protect Your Sender Reputation: Proactively monitor your domain to ensure you haven't been listed due to a security issue or a misconfigured server, allowing you to take action quickly.
Before Sending a Major Campaign: Check your status before launching a large email marketing campaign to ensure maximum deliverability and return on investment.
Verify a New IP Address: If you've just been assigned a new IP address from your hosting provider, it's crucial to check if it has a negative history from a previous user.
Don't let an unknown blacklisting cripple your most important communication channel. Get the visibility you need to protect your email deliverability. Use the fast, free, and essential Blacklist Lookup tool at ToolSeel.Com today.
Blacklist Lookup Key Features
IP Blacklist Check
Enter your server's IP or domain to see if it's on a spam blacklist.
Fix Email Delivery
Find out if being on a blacklist is causing your emails to go to spam.
Checks 100+ Blacklists
We scan your IP against all the major real-time blacklists (DNSBLs).
Clear Listed/OK Status
Get a simple and easy-to-read report of your status on every list.
Delisting Information
If you are listed, we provide a link to help you request removal.
A Quick Diagnostic Tool
A free tool for sysadmins to quickly check the reputation of their servers.
Blacklist Lookup FAQs
An email blacklist is a real-time database of IP addresses or domains reported for sending spam. Our lookup tool checks your server's IP or domain against dozens of these lists to see if you have been flagged, which can severely impact your email deliverability.
Simply enter the IP address of your mail server or your domain name into the search box. Click the 'Check Blacklists' button, and our tool will query all the major DNS-based blacklists and report back on your status with each one.
This is the first step in troubleshooting email deliverability. If your emails are not reaching the inbox or are being bounced, there's a high chance your server is on a blacklist. This tool helps you diagnose that problem quickly.
First, identify and fix the root cause (e.g., spam activity, misconfigured server). Then, visit the website of the specific blacklist that has flagged you. Each one has its own delisting process that you must follow to request removal.
Yes, your checks are private. The IP addresses and domains you query are used only to perform the real-time blacklist check. We do not store, log, or share your search history. Your server's reputation and security research remain completely confidential.