Last week, the security team at Return Path discovered that we were the source of a list of addresses used in a targeted phishing attack against a number of ESPs. We're sharing the results of our investigation with the larger community, in order to help others avoid similar attacks.
I'm including NANOG in this distribution because, even though this particular attack was focused on mail operators, the same tactics could work equally well on network operators. http://www.returnpath.net/blog/received/2010/11/phishing-attack-an-open-letter-to-the-anti-spam-and-mailbox-operator-community/ -- J.D. Falk Internet Standards & Governance Return Path
