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Email Blacklist Checker
Check if your domain's mail servers are listed on Spamhaus, Barracuda, SORBS, or SpamCop. A blacklist listing means your emails may be silently blocked or routed to spam.
Resolving mail servers and checking blacklists…
What are email blacklists?
Email blacklists (DNSBLs — DNS-Based Blackhole Lists) are databases of IP addresses known to send spam. When another mail server receives email from your domain, it checks these lists. If your mail server IP is listed, the email is rejected or marked as spam — silently, with no bounce to you.
Small businesses end up on blacklists for reasons they didn't cause: an employee clicked a phishing link, a compromised account sent bulk mail, or you're sharing a hosting IP with a spammer. Getting off a blacklist requires fixing the root cause first, then requesting delisting.