Spamhaus reports Verizon routing hijacked IPs

Late last week Spamhaus published a blog post detailing their investigation into Verizon routing millions of IP addresses hijacked by spammers.
The Spamhaus blog post goes into some detail about what hijacked routing is.

For cybercriminals to make use of their stolen blocks however, a crucial step is to find an Internet Service Provider(ISP) or network with the ability to route these IP addresses to the rest of the Internet by using an autonomous system number(ASN). Also crucial is finding an ISP who won’t look too closely at the highly suspicious routing request. To get the routes to their stolen IP addresses announced, criminals will present forged authorization documents…

Actions like this are why an unknown IP is considered hostile until proven otherwise. I regularly tell clients than 99 times out of 100 when there’s mail from an IP never seen before it’s spam. I’ve often wondered if I’m understating the problem. That is way more than 99 IPs in 100 are sending spam. But I thought that would be an exaggeration and overly aggressive. Seeing the hijacked IPs just being routed through one US provider, though, tells me I am understating the problem.
Nevertheless, this is extremely bad behavior by Verizon and it’s disappointing that they seem unable or unwilling to take action about the spam and abuse coming from their network.

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The most famous is probably “I’m sure they’ll unblock me if I can just explain my business model.” Trust me, the folks blocking your mail don’t want to hear about your business model. They just want you to stop doing whatever it is you’re doing. In fact, I’m one of the few people in the space who actually wants to hear about your business model – so I can help you reach your goals without doing things that get you blocked.
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bingo__email__save_1
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Spamtraps are …
… addresses that did not or could not sign up to receive mail from a sender.
… often mistakenly entered into signup forms (typos or people who don’t know their email addresses).
… often found on older lists.
… sometimes scraped off websites and sold by list brokers.
… sometimes caused by terrible bounce management.
… only a symptom …

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