August 16, 2006

Overall, spam and unwanted emails continue to seriously hinder the Web since a small number of large Internet Service Providers sell service knowingly to professional spammers for profit, or do nothing at all to help prevent spammers operating from their networks.

Even if 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 an 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.

As of Aug. 16, 2006, and in order of importance, the world's worst spam problem ISP networks today are:

1) verizonbusiness.com with 179 known spam issues
2) sbc.com with 82 known spam issues
3) interbusiness.it with 59 known spam issues
4) hinet.net with 54 known spam issues
5) xo.com with 52 known spam issues
6) ttnet.net.tr with 50 known spam issues
7) rtcomm.ru with 44 known spam issues
8) comcast.net with 44 known spam issues
9) tpnet.pl with 38 known spam issues
10) edu.tw with 37 known spam issues

Note: These statistics come from the Spamhaus Blocklist 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).

Source: Spamhaus.org