<i>The data does however show a few cases where actively routed address space was announced by the Spam networks, making this a hijack.</i><p>So on top of everything, you can get blacklisted for mail that didn't even come from your network?
The bit I had hoped to see at the end of this article: "and here's how we stopped these bogus routes at their upstream links, to prevent this problem from recurring".<p>Disappointing to see so much analysis and no solution.
This was fascinating to me. It feels like a major failing that I could register routes for address space I don't control. Kudos to the authors for explaining things in a way that a novice networking guy like myself could understand.
Interesting that people sophisticated enough in internet routing protocols to squat on unused IP space can get paid more working for spammers than legitimate companies.