Domain Blacklist Check
Check if your domain is listed on email and web blacklists.
Domain Blacklist Check — Verify Domain Reputation
Domain blacklist check queries Spamhaus DBL, SURBL, and URIBL to determine if a domain is listed as a spam sender, phishing site, or malware distributor — affecting email delivery and web reputation.
Unlike IP blacklisting which targets mail server IPs, domain blacklisting targets the sending domain name. A domain can be blacklisted even when sending from different IPs. Our tool checks all major domain reputation databases, returning results with risk score, listing tier, and delist links.
What is Domain Blacklisting?
Domain blacklisting is when a domain name is added to a Domain Block List (DBL). Receiving mail servers check the sender's domain against these lists to block spam regardless of which IP it's sent from.
Domain-based blacklists were developed to catch spammers who rotate IPs to evade IP blacklists. Spamhaus DBL lists domains used in spam messages — both sending domains and domains appearing in email body links. A domain listed on Spamhaus DBL will cause rejection at many major ISPs regardless of how clean the sending IP is.
Spamhaus DBL, SURBL, URIBL: Domain Blacklist Providers
Spamhaus DBL focuses on domains used in spam sending or linked in spam. SURBL aggregates multiple reputation sources. URIBL maintains its own database of spam-associated domains. Each has different listing criteria and delist procedures.
Spamhaus DBL is divided into zones: spam domain, phishing, malware, botnet C&C, and abused legitimate domains. SURBL combines multiple data sources. Our tool queries all zones and returns specific reasons for each listing so you understand the nature and severity of the problem.
How to Protect Your Domain Reputation
Protecting domain reputation requires proper SPF, DKIM, and DMARC authentication, clean list management, low spam complaint rates, and monitoring for unauthorized use of your domain in phishing campaigns.
Domain reputation is built over time and can be destroyed quickly. A single spam campaign or phishing attack impersonating your domain can result in blacklisting. Maintain reputation by enforcing DMARC with p=reject to prevent spoofing, monitoring bounce and complaint rates, using permission-based lists only, and setting up DMARC reporting to detect unauthorized senders.
Check domain reputation across Spamhaus DBL, SURBL, URIBL and other blacklists to protect email deliverability.
Check domain reputation nowUse Cases
Email marketers check domain reputation before campaigns to ensure their domain isn't blacklisted. Security teams check newly registered domains to assess phishing risk. Domain registrars use blacklist checks to identify abuse on their platforms. Brand protection teams monitor reputation to detect phishing campaigns impersonating their brand.