Domain Blacklist Check — DNSBL Lookup Online

101IP checks your domain's reputation against 8 URI DNSBL databases. If a domain is listed, emails from that domain may be rejected by spam filters.

Databases checked

• Spamhaus DBL — industry standard; distinguishes spam, phishing, malware and botnet C&C domains;
• URIBL Black / Grey / Red — domains found in spam messages: Black (spam only), Grey (mixed), Red (unconfirmed);
• SURBL Multi — combined SURBL list covering phishing, spam and malware domains;
• SORBS RHSBL — right-hand side blacklist for sender domain reputation;
• SEM Fresh — recently registered domains observed in spam campaigns.

Domain vs IP blacklist

An IP blacklist checks the sending mail server's reputation. Domain Blacklist checks the domain itself as it appears in message bodies, links and sender addresses. Both are important for diagnosing email deliverability issues.

How to remove a domain from the blacklist

• Visit the DNSBL's website and submit a delisting request;
• Ensure the domain is not being used to send spam or phishing messages;
• Scan the website for malware or compromised content;
• Set up SPF, DKIM and DMARC records to prevent future listings.

Frequently Asked Questions

• What should I do if my domain appears in the Spamhaus DBL list?

  First, follow the link in the report to the Spamhaus website to find the exact reason for the block. The most common causes are spam links on the site or a compromised server. Fix the issue (remove malicious code or patch vulnerabilities), then submit a delisting request through the Spamhaus DBL form. After the request is processed, re-check the domain on 101IP.ru — the status should change to OK.

• Is domain blacklist checking different from IP blacklist checking?

  Yes, these are different procedures. Domain Blacklist checks URI-based databases and DNSBLs that evaluate the reputation of the domain name itself and links associated with it. IP Blacklist checks the reputation of the mail server at a specific IP address. It is recommended to run both tests, as a block may be placed on either element independently.

• Can my domain end up in SURBL or URIBL because of a single link posted on a forum?

  It is unlikely if the link points to a legitimate resource. URIBL and SURBL scan millions of pages and block only domains clearly associated with spam or phishing. If you accidentally posted a link to a suspicious site, simply remove it and wait for the databases to update — usually 24 to 72 hours. Regular monitoring with our tool is the best way to stay informed.