1. Find the cause
Check your sending logs for unusual volume. Typical causes: a hacked mailbox or password, a web form abused by bots, malware on a computer behind the same IP, or a campaign sent to an old, scraped or purchased list.
Free tool · no sign-up
Free e-mail blacklist checker
Find out whether a domain or an IP address is listed on the e-mail blacklists (DNSBLs) that mailbox providers and spam filters consult. For a domain we check the domain itself, its website IP and its mail server IPs — and we tell you plainly when a list could not be queried.
Blacklist report for
Listed
Not listed
Unavailable
You are listed — what to do now
Fix the cause before you ask for removal, or you will be listed again: stop the sending that triggered it (a compromised account or form, an infected machine, or a campaign to an old or purchased list), then use each list’s own removal page. Many lists, such as SpamCop, expire listings automatically once the problem stops.
About network-level listings
UCEPROTECT Level 2 and Level 3 list whole IP ranges or entire provider networks (ASNs) when enough IPs in them misbehave. A listing there does not mean your own IP sent spam, few major mailbox providers rely on these lists, and the fix is usually up to your hosting provider. Focus first on listings in the other lists.
Some lists could not be checked
What we checked
This domain has no IPv4 website (A) or mail server (MX) address, so only the domain blacklists were checked.
| Blacklist | Checked | Status | Note |
|---|
No results in this filter.
DNS is only half of deliverability — clean your list
Create free account — 200 credits Perfect records do not stop bounces. Sending to invalid, disposable or abandoned addresses hurts your sender reputation and can get your IP blacklisted. Validate your list before the next campaign.
How this blacklist checker works
- 1
We find what to check
For a domain we check the domain name on domain blacklists, then resolve its website (A) and mail server (MX) IPs and check those on IP blacklists. For an IPv4 address we check just that IP.
- 2
Live DNSBL queries
Each blacklist is queried live over DNS. Every list we use was verified with its official test entries, and lists that answer “listed” for everything were left out.
- 3
Honest results
Listed, not listed or unavailable — for every list and address, with a link to the list’s own website and the reverse DNS of each IP.
Listed? How to get delisted
A listing is a symptom. Requesting removal without fixing the cause rarely works for long.
2. Stop it and clean up
Reset compromised passwords, add CAPTCHA to forms, patch the infected machine and pause bulk sending. Remove invalid and inactive addresses from your list before sending again.
3. Request removal
Open the list’s website (linked in the results) and follow its delisting procedure. Some lists remove entries automatically after a quiet period; others need a request. A few sell “express” removal, but paying is never the only way out.
4. Prevent the next one
Authenticate your domain (SPF, DKIM, DMARC), set a reverse DNS on sending IPs, honour unsubscribes and validate new addresses at sign-up. Re-check here after a few days.
Types of blacklists
Not all listings are equal. What a listing means depends on the kind of list.
IP blacklists
List individual IP addresses that sent spam or show signs of compromise. These matter most for the servers that send your e-mail.
Domain blacklists
List domain names found in spam, either as the sender or inside links in the message body. A listing can hurt every message that mentions your domain.
Network-level lists
UCEPROTECT Level 2 and 3 list entire ranges or provider networks. They are a signal about your provider’s neighbourhood rather than about you.
Backscatter lists
List servers that send bounces or auto-replies to forged sender addresses. Being listed means your server accepts mail first and bounces it later instead of rejecting it during the SMTP conversation.
Frequently asked questions
Is this blacklist checker free?
Yes. You can run 20 checks a day without an account. The tool only makes DNS queries — nothing is sent from or to your server.
What is an e-mail blacklist (DNSBL)?
A DNS-based list of IP addresses or domains associated with spam or abuse. Mail servers and spam filters query these lists in real time and reject, filter or score messages from listed sources.
Which blacklists matter most?
Spamhaus is used by a very large share of mail servers; Barracuda, SpamCop and Mailspike are also widely consulted. Smaller lists usually have limited impact on their own, but several listings at once are a clear warning sign.
Why is a list shown as “unavailable”?
Because it did not give us a reliable answer — it refused our query, rate-limited it or did not reply. We show that honestly instead of reporting “not listed”. Spamhaus, for instance, only answers authorised queries.
My hosting provider’s whole network is listed. Is that my fault?
Usually not. Network-level lists such as UCEPROTECT Level 2 and 3 list entire IP ranges when enough of their neighbours send spam. Talk to your provider; if your own IP is clean on the other lists, the impact is normally small.
How long does a delisting take?
It depends on the list: some remove entries automatically within 24 hours to a few days once the abuse stops; others act within hours after a removal request. Fix the cause first, or the listing comes back.
Why does reverse DNS (PTR) matter?
Major mailbox providers expect every IP that sends e-mail to have a PTR record whose name resolves back to the same IP. Without it, messages are frequently rejected or filtered, even if the IP is on no blacklist.
How do I avoid getting blacklisted?
Send only to people who asked for your e-mail, remove bounces and inactive addresses, validate new addresses at sign-up, authenticate your domain with SPF, DKIM and DMARC and keep your servers and forms protected from abuse.
Healthy domain + clean list = inbox
A free account gives you 200 credits (10 for free-provider e-mails) to validate lists in bulk, through the REST API or in real time on your forms.
Create free account — 200 creditsNo credit card. Credits never expire.