IP Blacklists & DNSBL: How to Check and Get Delisted

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Learn how to check and get delisted from IP blacklists (DNSBLs) to prevent email delivery issues

intermediate Published 12 Apr 2026
Action Steps
  1. Check your IP address against DNSBLs using online tools like MXToolbox or WhatIsMyIP
  2. Use command-line tools like dig or host to query DNSBLs manually
  3. Configure your email server to use a reputable DNSBL service
  4. Test your email delivery by sending test emails to major email providers
  5. Apply for delisting if your IP is blacklisted by following the DNSBL provider's removal process
Who Needs to Know This

DevOps and email marketing teams can benefit from understanding IP blacklists to ensure reliable email delivery

Key Insight

💡 IP blacklists can block legitimate emails, so regular checks and delisting are crucial

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