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The Spamhaus Block List The SBL is a realtime database of IP addresses of verified spam sources and spam operations (including spammers, spam gangs and spam support services), maintained by the Spamhaus Project team and supplied as a free service to help email administrators better manage incoming email streams. The SBL is queriable in realtime by mail systems thoughout the Internet, allowing email administrators to identify, tag or block incoming connections from IP addresses which Spamhaus deems to be involved in the sending or origination of Unsolicited Bulk Email (aka "Spam"). The SBL database is maintained by a dedicated international Spamhaus team based in 9 countries, working 24 hours a day, 7 days a week to list new confirmed spam issues and - just as importantly - to delist resolved issues. For listing policy and delisting procedure please see SBL Policy and SBL Delisting Procedure SBL is included as part of the Spamhaus ZEN combined blocklist. For information on how to use the SBL to protect your mail server or network, see SBL Questions. Incorporating SBL filtering as 1st and 2nd stage filters is explained in the document: Effective Spam Filtering SBL Usage Use of the Spamhaus DNSBLs is free of charge for low-volume non-commercial use. To check if you qualify for free use, please see: Spamhaus DNSBL usage criteria. |
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