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Q & A Security · August 21, 2026

Can a domain be blacklisted even if I never sent spam?

Yes. Phishing campaigns often forge (spoof) a legitimate domain in email headers without controlling it. If someone uses your domain in phishing emails, it can appear on domain reputation lists like Spamhaus DBL even though you never sent anything. DMARC with p=reject prevents spoofing and protects your domain’s reputation.

Read the full guide
How to Check If a Domain Is Blacklisted (Step-by-Step)
A domain blacklist listing can silently kill email delivery and trigger browser warnings. This guide walks through how to check any domain against 50+ blocklists, read the results, and take action.
Related questions
Do I need to check all blacklists or just the major ones? How long does delisting take? What's the difference between an IP blacklist and a domain blacklist?