Is a Domain Blacklisted? How to Check and How to Recover

Discovering that your domain is on a blacklist is one of those SEO and email marketing emergencies that demands immediate action. Email campaigns stop landing in inboxes. Visitors see security warnings in their browsers. In serious cases, your pages disappear from search results entirely.

The good news: most blacklistings are removable. The process requires identifying which lists you are on, fixing the root cause, and submitting formal delisting requests. This guide walks you through every step — from running the initial check to confirming your removal is complete.

For a broader understanding of domain health as part of your SEO workflow, see our complete guide to domain research and vetting.

What Is a Domain Blacklist?

A domain blacklist (also called a blocklist or DNSBL — DNS-based blocklist) is a database of domains and IP addresses flagged for sending spam, hosting malware, distributing phishing content, or participating in other abusive network behavior.

These lists are maintained by independent organizations, email security companies, and security researchers. Internet service providers, email servers, web browsers, and security software query these lists in real time to decide whether to deliver email from or display pages hosted on a given domain.

Types of Blacklists and What They Affect

How to Check If Your Domain Is Blacklisted

Use a Blacklist Lookup tool to check your domain or IP against all major databases simultaneously. This tells you which specific lists you appear on so you can prioritize your removal requests.

Also run a separate Suspicious Domain Check — this catches malware flags and phishing indicators that standard spam blacklists may not cover.

Finally, check Google’s Safe Browsing status separately at transparencyreport.google.com/safe-browsing/search — a Google listing has direct search ranking consequences and requires its own delisting process through Google Search Console.

Step-by-Step: How to Get Off a Blacklist

Step 1: Run the Blacklist Lookup and Document Your Listings

Enter your domain and your server’s IP address separately — sometimes only the IP is listed, not the domain itself, or vice versa. Note every blacklist where you appear, the date of the listing, and the reason given (most blacklists provide this in their lookup results).

Step 2: Check Google Safe Browsing

Visit the Google Transparency Report and enter your domain. If flagged, Google will show you the type of threat detected (malware, unwanted software, social engineering/phishing). This is the most urgent listing to address because it directly affects browser warnings and search visibility.

Step 3: Identify the Root Cause

Do not submit a delisting request until you have found and fixed what caused the listing. Common root causes:

• Compromised website: Hackers injected malicious code, redirects, or phishing pages without your knowledge. Scan your site using a malware scanner and check for unauthorized file changes.
• Compromised email account: A single email account sending bulk spam is enough to get your domain listed. Check your email sending logs for unusual activity.
• Spam mailing list practices: Sending to unverified, purchased, or stale lists triggers spam trap hits, which leads to blacklisting.
• Shared hosting neighbor: If you are on shared hosting, another site on the same IP may have caused the IP-level listing. Contact your hosting provider.
• Compromised WordPress plugins or themes: Outdated plugins are the most common vector for injected malicious code on WordPress sites.

Step 4: Fix the Issue Completely

• Remove all malware from the server and restore clean files from a verified backup
• Change all passwords: cPanel, FTP, WordPress admin, email accounts, database
• Update all plugins, themes, and core WordPress to the latest versions
• Remove any unauthorized admin users or scripts
• If a spam campaign was sent: stop all sending, clean your list, implement double opt-in going forward
• If shared hosting caused the issue: request an IP change from your hosting provider or migrate to a dedicated IP

Step 5: Submit Delisting Requests

Each blacklist has its own delisting process. Go to each blacklist’s website directly and submit the appropriate removal form. Most major lists include:

• Spamhaus: spamhaus.org/removal — separate processes for SBL, XBL, and PBL listings
• Barracuda: barracudacentral.org/rbl/removal-request
• SORBS: has a self-service lookup and removal portal
• Google Safe Browsing: Submit a security issues reconsideration request via Google Search Console under Security & Manual Actions
• Microsoft SNDS: postmaster.live.com/snds — for Microsoft/Hotmail/Outlook deliverability issues

Step 6: Re-Check After 48–72 Hours

Run the blacklist lookup again to confirm removal. Some lists update within hours of a successful delisting. Others may take up to seven days. If a listing persists after 72 hours, follow up directly with the blacklist operator — most have contact forms for escalating stalled removal requests.

What to Expect After Delisting: Email Deliverability Recovery

Being removed from a blacklist does not immediately restore your email reputation. Email providers cache reputation data and update it gradually. Expect the following recovery timeline:

• Days 1–7: Blacklist removal confirmed. Some receiving servers still see the cached listing and may reject or filter your messages.
• Days 7–14: Most major providers have updated their caches. Deliverability begins recovering. Inbox placement rates improve but may still be below pre-listing levels.
• Days 14–30: Full deliverability restoration for engaged subscriber segments. Continue sending only to active subscribers during this period.

During recovery, prioritize sending to your most engaged subscribers (recent openers and clickers). High engagement signals accelerate the reputation rebuild.

How to Prevent Future Blacklistings

• Implement SPF, DKIM, and DMARC: Email authentication records prevent spoofing and signal to email providers that you are a legitimate sender.
• Never send to purchased or unverified lists: Every spam trap hit increases your blacklisting risk. Build your list through double opt-in only.
• Run regular malware scans: Schedule weekly security scans using a security plugin or your hosting provider’s malware scanner.
• Keep all software updated: Outdated WordPress core, plugins, and themes are the primary malware injection vector for most small business websites.
• Monitor your blacklist status monthly: Set a recurring reminder to run a blacklist check. Catching a listing early reduces the damage significantly.
• Use a dedicated IP for email marketing: If you send high volumes, a dedicated sending IP separates your email reputation from your web hosting IP.

Common Mistakes When Dealing With Blacklistings

• Requesting removal before fixing the issue. Blacklists re-list rapidly if the root cause is not resolved. Most legitimate lists will not process a second removal request until a waiting period (sometimes 30 days) passes.
• Only checking one blacklist tool. No single tool covers all 100+ public blocklists. Cross-reference at least two tools and always check Google Safe Browsing separately.
• Ignoring IP-level listings. Your domain might be clean, but your server IP could be listed — which affects all domains hosted on that server. Always check both.
• Resuming full email volume immediately after delisting. High-volume sending right after removal, before reputation has recovered, often triggers new spam complaints and re-listing.

Expert Tips

• Set up Google Search Console alerts. Google Search Console will notify you immediately if your site is flagged for security issues — far faster than a manual check.
• Check your IP alongside your domain. Use a Blacklist Lookup with your server IP, not just your domain name, as IP-level listings are separate from domain listings.
• Document everything during removal. Screenshot the blacklist entries before and after removal. Keep records of every step you took to fix the issue — you may need this documentation if a list disputes your removal request.

Action Checklist

• ☐ Run Blacklist Lookup for both your domain and your server IP
• ☐ Check Google Safe Browsing Transparency Report separately
• ☐ Document all current listings and the reason each list provides
• ☐ Scan your website for malware and unauthorized files
• ☐ Review email sending logs for unusual activity
• ☐ Fix the root cause completely before submitting any removal requests
• ☐ Change all passwords (cPanel, FTP, WordPress admin, email, database)
• ☐ Submit delisting requests to each blacklist individually
• ☐ Submit a security issues reconsideration request in Google Search Console if flagged by Google
• ☐ Re-run blacklist lookup after 48–72 hours to confirm removal
• ☐ Implement SPF, DKIM, and DMARC if not already configured
• ☐ Set a monthly blacklist monitoring reminder going forward

Frequently Asked Questions

What does it mean if a domain is blacklisted?

A blacklisted domain has been flagged by a spam database, email security provider, or malware detection service for sending spam, hosting malware, or being involved in phishing. Depending on which list you appear on, this can affect your email deliverability, cause browser warnings for visitors, or result in pages being blocked by security tools.

How do I check if my domain is blacklisted?

Use a free Blacklist Lookup tool that checks your domain or IP against major spam and malware databases simultaneously. Also check Google’s Safe Browsing Transparency Report separately, as Google’s list is not always included in third-party tools.

How long does it take to get off a blacklist?

Removal timelines vary by blacklist. Some lists like Spamhaus update within 24–48 hours after a successful delisting request. Others may take 5–7 days. Google Safe Browsing typically processes removal reviews within 1–3 days after you submit a request via Google Search Console.

Can a blacklisted domain affect my Google rankings?

A listing on Google’s own Safe Browsing database directly affects your site — Google displays a red warning page to visitors and may delist your pages from search results. Listings on email spam databases alone do not directly affect Google rankings, but they prevent effective email marketing until removed.

What causes a domain to get blacklisted?

Common causes include sending bulk spam emails, hosting malware or phishing pages, being hacked and used in a spam network without your knowledge, having a compromised email account send spam, or sharing a hosting IP with blacklisted sites.

How do I remove my domain from a blacklist?

Fix the root cause first — remove malware, stop spam activity, patch the security vulnerability. Then visit each blacklist’s website and submit a formal delisting request. For Google Safe Browsing, submit a security issue request through Google Search Console after cleaning your site.

Will my email deliverability recover after delisting?

Yes, but it takes time. Email providers cache reputation data. After delisting, expect 2–4 weeks before deliverability fully recovers to pre-listing levels. During recovery, send smaller volumes to your most engaged subscribers first to rebuild sender reputation gradually.

Conclusion

A domain blacklisting is serious — but it is also fixable. The key is speed: the faster you identify which lists you are on, fix the underlying cause, and submit removal requests, the shorter the window of damage to your email deliverability and search visibility.

Make blacklist monitoring a monthly routine rather than an emergency response. Set up Google Search Console alerts, run a scheduled blacklist check, and keep your security fundamentals in order — updated software, strong passwords, and proper email authentication.

If you need help diagnosing a domain security issue or recovering from a Google penalty, the team at EW Marketings can assist. Request a free consultation to discuss your situation and next steps.