Spam continues to plague the Internet because a small number of large Internet Service Providers sell service knowingly to professional spammers for profit, or do nothing to prevent spammers operating from their networks.

Although all networks claim to be anti-spam, some network executives factor revenue made from hosting known spam gangs into corporate policy decisions to continue to sell services to spam operations. Others simply decide that closing the holes in their end-user broadband systems that allow spammers access would be too costly to their bottom lines.

The majority of the world’s service providers succeed in keeping spammers off their networks and work to maintain a positive anti-spam reputation, but their work is undermined daily by the few networks who, out of corporate greed or mismanagement, choose to be part of the problem.


Source: Spamhaus Blocklist (SBL) database. Data is compiled automatically every 24 hours from the SBL database and sorted by the number of currently listed SBL records for each network (ISP/NSP). The source data, including record information on each spam issue listed can be viewed by clicking on the Number of Known Spam Issues links.

http://www.spamhaus.org/statistics/networks.lasso

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