Enter your email address or sending domain below to run a real-time DNSBL blacklist check across major anti-spam databases (Spamhaus, SpamCop, Barracuda, SORBS) and verify your MX, SPF, and DMARC authentication.
Instant 0-credit pre-scan (duplicates, typos, disposables, roles) + live 5-email Smart SMTP sample check. Unlock 5,000 credits for $19 (never expire).
Enter your full email address (e.g., you@yourcompany.com) or domain name into the checker above and click "Check Blacklist Status". Our engine resolves your mail server IPs and queries major DNSBL blocklists plus your SPF and DMARC records in real time.
The #1 cause of domain and IP blacklisting is sending campaigns to unverified email lists that generate high hard-bounce rates (>2%) or hit recycled spam traps. Cleaning your email list with a 7-Layer Smart SMTP verifier before sending prevents DNSBL listings.
First, stop sending to unverified lists and ensure SPF, DKIM, and DMARC are properly configured. Then visit the specific blocklist’s removal portal (such as check.spamhaus.org or barracudacentral.org/lookups) to request delisting after fixing the root cause.