Is My IP or Domain Blacklisted?
Check if your IP address or domain appears on major email blacklists (DNSBLs).
Email deliverability problems often trace back to a blacklisted IP or domain. Our free checker queries major DNS-based blacklists (DNSBLs) in seconds, so you can identify listings and take action before your emails stop reaching inboxes.
What We Check
- ✓Checks 9+ DNSBL providers including Spamhaus, Barracuda, and SpamCop
- ✓Works with both IP addresses and domain names
- ✓Shows which specific blacklists flag your IP or domain
- ✓No signup or API key required
- ✓Instant results — queries run server-side in parallel
Frequently Asked Questions
What is a DNSBL blacklist?
A DNSBL (DNS-based Blackhole List) is a database of IP addresses and domains known to send spam or malicious email. Mail servers query these lists in real time to decide whether to accept, reject, or flag incoming messages. If your IP or domain appears on a DNSBL, your emails may be blocked or sent to spam.
Why is my IP blacklisted?
Common reasons include sending spam (intentionally or via a compromised account), running an open relay, being on shared hosting with a spammer, having a misconfigured mail server, or being part of a botnet. Sometimes a previous owner of the IP address caused the listing.
How do I get removed from a blacklist?
First, identify and fix the underlying issue — stop the spam, patch the vulnerability, or secure the compromised account. Then visit the DNSBL provider's website and submit a delisting request. Most providers have a self-service removal form. Some lists delist automatically after a waiting period once the abuse stops.
Does being blacklisted affect my email?
Yes. If your sending IP or domain is on a major blacklist, recipient mail servers may reject your messages outright or route them to the spam folder. This can significantly hurt email deliverability for marketing campaigns, transactional emails, and everyday communication.
How often should I check my blacklist status?
If you operate a mail server or send email in bulk, check at least once a week. For critical sending infrastructure, daily automated monitoring is recommended. Occasional senders should check whenever they notice delivery problems such as bounced emails or low open rates.
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