IP & Domain Blacklist Checker

Check any IP or domain against major spam blacklists (DNSBLs) — Spamhaus, Barracuda, SpamCop, and SORBS.

Why Blacklist Status Matters for Canadian Businesses

If your IP or domain is blacklisted, emails you send may be silently rejected or sent to spam by major providers (Gmail, Outlook, Bell, Rogers). This directly impacts transactional emails, invoices, and customer communications. Under Canada's Anti-Spam Legislation (CASL), businesses are expected to maintain secure, reputable sending infrastructure. A blacklisted IP can also be a sign of a compromised server — investigate any listings promptly.