Check whether your website or IP is on a security blacklist, understand why blocklists matter for deliverability and trust, and follow a recovery workflow to get delisted.
Blacklists (now usually called blocklists) are reputation feeds maintained by security vendors and ISPs. Email providers, browsers, and firewalls consult them to decide whether to block traffic. A listing affects deliverability, organic visibility, and user trust.
Don't request delisting before fixing the cause — most lists permanently mark repeat offenders. Patch software, rotate credentials, scan for malware, configure email authentication, then submit removal requests with a short summary of what was fixed.
Run through these steps in order. Each step links to the right diagnostic tool.
Verify DNS for SPF / DKIM / DMARC
Bad email auth is the #1 cause of recurring listings.
Open DNS LookupRun a website safety scan
Look for malware and phishing content on the site itself.
Open Website SafetyCommon causes: malware infection, compromised forms, spammy outbound email, sharing an IP with a bad actor, or hosting phishing content (often without the owner's knowledge).
From minutes to weeks. Major lists process automated requests quickly once the underlying issue is fixed; some require manual review.
Yes — search engines flag and may de-rank flagged sites, and many email providers refuse mail from blacklisted IPs and domains.
Absolutely. Most blocklists don't notify you. That's why continuous monitoring matters.
Monitor it continuously
Save this check, get alerts on changes, and track multiple domains in one dashboard.