This is an article from Virus Bulletin on Hamfighting, July 2006, made available here by kind permission of Virus Bulletin, which holds the copyright. (You can also read it at HTML on the Virus Bulletin site, but for that you need to be a subscriber – registration is free, though.)
It addresses the problem of legitimate mail (‘ham’) misdiagnosed as spam, with particular reference to aggressive filtering by Verizon. I’m putting it up here now because it has particular relevance to a post I’m putting together on Mac Virus. Brief extract from the introduction to the paper:
Complaints in various forums of poor email delivery service from the ISP seemed to be confirmed by claims from Verizon ‘insiders’ that a policy of rejecting mail by IP block resulted in the loss of all mail from large portions of Europe and Asia. This led to a much publicized class action, resulting in a settlement offer from Verizon to compensate customers who lost legitimate mail between October 2004 and May 2005.
I’ll probably be putting up some more papers and articles that aren’t available on my own sites, in the near future, or external links where appropriate.
David Harley CITP FBCS CISSP
ESET Senior Research Fellow