Real-time Blacklist: SPAMHAUS

By: Jennifer Nespola


The SPAMHAUS Project is an international organization, founded in 1998 to track email spammers and spam-related activity. Spamhaus Block List (SBL) posts IPs that have sent Unsolicited Bulk Email (UBE) to one or more of Spamhaus’ honeypot addresses.


IPs listed because of poor mailing practices are highly visible to ISPs and experience significant deliverability issues. Remediation is required to remove the listing, but can only occur after a thorough review of current strategies takes place and changes are implemented.


This whitepaper by the Deliverability team at Zeta Global will help you steer clear from SPAMHAUS’ radar.