How to Check If Your Email Domain Is Blacklisted (Free, 30 Seconds)

Getting your email domain blacklisted can happen to anyone — even well-run businesses. A compromised server, a burst of complaints, or a misconfigured DNS record can land you on a blacklist without warning. The faster you find out, the faster you can fix it.

The simplest way to check is to use a multi-blacklist checker: enter your domain or IP address, and the tool checks it against all major DNSBLs simultaneously — returning results in under 10 seconds instead of manually checking each list one by one.

Email blacklists target IP addresses, not just domain names. Your sending IP is the IP address your mail server uses to deliver outbound email. It's different from your website's IP. To find it:

• Check your email service provider's settings panel • Send a test email and look at the 'Received:' headers • Use an MX lookup tool to find your mail servers, then resolve their IPs

If you're using a shared sending provider (SendGrid, Mailchimp, Postmark), you may have been assigned a dedicated IP — or you may share an IP with other senders.

Enter your domain or sending IP into a blacklist checker. A good checker will test against all major DNSBLs: Spamhaus ZEN, Barracuda BRBL, SpamCop, UCEPROTECT levels 1-3, SpamRATS, Abusix, and dozens more.

IsMyEmailBlacklisted checks 60 blacklists simultaneously — running parallel DNS queries so you get results in under 10 seconds. It also checks your SPF, DKIM, and DMARC records and gives you a deliverability score from 0-100.

After checking, you'll see one of three statuses for each blacklist:

• Clean: Your IP/domain is not listed on this blacklist. • Listed: Your IP/domain appears on this blacklist. This is the one you need to act on. • Error: The lookup couldn't complete (usually a temporary DNS issue).

Not all listings are equally serious. Spamhaus ZEN and Barracuda BRBL affect the most mail servers worldwide — a listing on either can cause widespread delivery failures. UCEPROTECT Level 3 and some smaller lists have minimal impact.

If you find a listing, don't panic — most blacklistings are fixable:

1. Identify the root cause: Was it a compromised account? An open relay? High complaint rates? Sending to a spam trap? Fix the underlying issue first, or you'll be relisted.

2. Request delisting: Each blacklist has its own removal process. Spamhaus and Barracuda offer self-service removal portals. SpamCop listings expire automatically after a period of clean sending. UCEPROTECT requires waiting for automatic expiry unless you pay for expedited removal.

3. Monitor going forward: Set up automated monitoring so you catch future listings within minutes rather than discovering them days later when customers report missing emails.

1. 1

   Identify which blacklist(s)

   Use a multi-list checker to see exactly which blacklists have you listed. The removal process differs for each — don't submit a generic request.

2. 2

   Find and fix the root cause

   Check server logs for spam activity. Investigate compromised accounts, open relay configs, or purchased list usage. Fix first — otherwise you'll be relisted within days of removal.

3. 3

   Submit removal request

   Follow each blacklist's specific removal process. Spamhaus SBL requires manual review. Barracuda is self-service. SpamCop auto-expires. See removal URLs in the blacklist table.

4. 4

   Verify you're clean

   After the expected removal window, recheck with a blacklist scanner to confirm the listing is gone before resuming normal email volume.

5. 5

   Set up monitoring

   Configure automated monitoring so future listings are caught in minutes. The detection gap is what turns a minor incident into a crisis.

A clean blacklist status is necessary but not sufficient for good email deliverability. While you're checking, also verify:

• SPF record: Is it published? Does it include all your sending services? Does it stay within the 10 DNS lookup limit? • DKIM signing: Are your emails cryptographically signed? Is the key at least 1024 bits (2048 recommended)? • DMARC policy: Do you have a DMARC record? Is the policy at least quarantine? • Reverse DNS (PTR): Does your sending IP have a matching forward/reverse DNS record? • MTA-STS: Is TLS enforced for incoming connections to your mail server?

IsMyEmailBlacklisted checks all of these automatically when you run a domain scan.

If you're sending any significant volume of email — marketing, transactional, or even just business correspondence — you should monitor your blacklist status continuously. New listings can appear at any time.

Manual checks are a good starting point, but automated monitoring is essential for businesses that rely on email. The difference between catching a listing in 15 minutes vs. 3 days is the difference between a minor hiccup and a major deliverability crisis.