What is the SBL?

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What is the SBL?

The Spamhaus Block List (SBL) is a realtime database of IP addresses of spam sources, including known spammers, spam gangs, spam operations and spam support services. SBL listings are made according to policies outlined in SBL Policy & Listing Criteria.

The database is maintained every day, around the clock, by Spamhaus Project team members around the world.

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