Email Blacklist Checker
Check your domain against 14 major blacklists instantly. Find out if your emails are being blocked before your recipients tell you.
Enter a domain name (e.g., example.com). We check domain-based blacklists using DNS lookups.
Checking blacklists...
Clean
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How Blacklist Checking Works
Email blacklists (also called DNSBLs — DNS-based Block Lists) are databases of domains and IP addresses that have been flagged for sending spam or malicious email. Major email providers like Gmail, Yahoo, and Microsoft check these lists when deciding whether to accept or reject incoming mail.
This tool queries public DNS records to check whether your domain appears on major blacklists. When a domain is listed, the blacklist's DNS zone returns a positive response. When the domain is clean, the query returns no result.
We check domain-based blacklists (DBLs) rather than IP-based blacklists, since domain reputation has become more important than IP reputation in modern email filtering.
Frequently Asked Questions
How do I check if my email domain is blacklisted?
Enter your domain name in the checker above and click "Check Blacklists." The tool queries 14 major DNS-based blacklists (DNSBLs) in real time to see if your domain appears on any of them. Results are returned in seconds.
What happens if my domain is on a blacklist?
Being on a blacklist means some email servers will reject or spam-folder your emails. The impact depends on which blacklist — Spamhaus and Barracuda carry the most weight. A single listing on a minor list may not cause noticeable issues, but multiple listings will significantly hurt deliverability.
How do I get removed from an email blacklist?
Most blacklists have a self-service delisting process on their website. First, fix the underlying issue (compromised account, spam complaints, open relay, etc.). Then visit the blacklist provider's site and submit a delisting request. Removal usually takes 24-48 hours.
What causes a domain to get blacklisted?
Common causes include sending to purchased or scraped email lists, high spam complaint rates (above 0.3%), sending from a compromised account, missing email authentication (SPF/DKIM/DMARC), and sending large volumes without proper warmup.
How often should I check my blacklist status?
Check at least monthly, or immediately if you notice a sudden drop in email deliverability or open rates. If you send high volumes (10,000+ emails/day), consider checking weekly. Some monitoring services can alert you automatically when a new listing is detected.