New Spamhaus lists

Spamhaus announced today they are publishing two new BGP feeds: Extended DROP and the Botnet C&C list. These lists are intended for use inside routers in order to stop all traffic to or from listed IP addresses. This is a great way to impact botnet traffic and hopefully will have a significant impact on virus infections and botnet traffic.
In other news I’ve been hearing rumbling about changes at Yahoo. It looks like they have changed their filters and some senders are feeling lots of pain because of it. It looks like senders with low to mid range reputations are most affected and are seeing more and more of their mail hit the bulk folder. This afternoon I’m hearing that some folks are seeing delivery  improvements as Yahoo tweaks the changes.

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News snapshot

  • The judge in e360 v. Spamhaus has denied Spamhaus’ motion for dismissal. However, the judge also ordered that the 16 new witnesses be stricken and capped damages at the original $11.7M. Mickey has the order.
  • Tuesday the FTC announced it had shut down a major spamming operation. I am not sure the results are visible yet, yesterday there were 2041 spams in one of my mailboxes yesterday versus 2635 a week ago.
  • The FBI announced today it had infiltrated and shut down a international carding ring. While not directly spam related the phishers and carders work together and some of them use spam.
  • Rumor has it that many mailers are seeing problems delivering to AOL the last few days. It seems that AOL is making adjustments to their filtering system. As when any ISP changes filter rules and weights, some of the people just skirting by see delivery problems. What people are hearing is that if they are seeing delivery problems at AOL they need to improve their reputation.
  • Last week Yahoo had another online workshop with the mail folks. They have published a transcript of the talk. I was at the talk and there were only a couple spam related questions.

donhburger: Why does Yahoo sell our email addresses to spammers?
YMailRyan: We absolutely don’t sell your addresses to spammers. No IFs, ANDs, or BUTs about it.
imintrouble: My mom keeps emailing em but I never get it and usually it ends up in my spam box. Why? How do I make this stop? She’s getting pissed that I’m not replying.
YMailTeam: Oh no! Be sure your Mom is on your contact list– this should help keep mom out of spam box and put her back into your inbox.
buergej: Just why do I keep receiving the same kind of spam from a series of what appear to be women day after day after day?
YMailCarl: Spam is, unfortunately a constant problem for anyone using email. The reason you are receiving these emails is because spammers have somehow gotten a hold of your email address and are mailing you their lovely messages. There are several things you can do to assist with this. First, continue to report these messages as “Spam” by clicking the button at the top of the email labled “Spam”. Note that you don’t need to actually look at the message to do this. When you report items as spam it lets Yahoo! know that messages originating from that person are likely spam. This not only helps you, but helps other Yahoo! users as well.
YMailCarl: Second, if the emails are from similar names, you can set up filters in your email account to block those names and send them to your trash or spam folder.
YMailCarl: Obviously these messages you are receiving are not from women trying to sell you products personally – the messages are typically generated by a script which will try to forge or “spoof” the originating address.
YMailCarl: We agree that Spam is a serious issue and have many resources dedicated to fighting this problem.
YMailCarl: You can find some additional information about fighting spam here: http://help.yahoo.com/l/us/yahoo/mail/original/abuse/index.html
donhburger: Why when I mark Emails as Spam do I continue to get emils from the same persons?
YMailMaryn: When you mark a message as “spam” from within your Inbox that moves the message to your Spam Folder. And all subsequent messages that are sent from that particular sender will not be delivered to your Inbox, but will be delivered to your Spam Folder.

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Censorship, email and politics

Spamfiltering blocks email. This is something we all know and understand. For most people, that is everyone who doesn’t manage an email server or work in the delivery field or create spamfilters, filtering is a totally unseen process. The only time the average person notices filters is when they break. The breakage could be blocking mail they shouldn’t, or not blocking mail they should.
Yesterday, a bunch of people noticed that Yahoo was blocking mail containing references to a protest against Wall Street. This understandably upset people who were trying to use email as a communication medium. Many people decided it was Yahoo (a tool of the elites!) attempting to censor their speech and stop them from organizing a protest.
Yeah. Not so much.
Yahoo looked into it and reported that the mail had gotten caught in their spam filters. Yahoo adjusted their filters to let the mail through and all was (mostly) good.
I don’t think this is actually a sign of filters being broken. The blocked mail all contained a URL pointing to a occupywallst.com. I know there was a lot of speculation about what was being blocked, but sources tell me it was the actual domain. Not the phrase, not the text, the domain.
The domain was in a lot of mostly identical mail coming out of individual email accounts. This is a current hallmark of hijacked accounts. Spammers compromise thousands of email accounts, and send a few emails out of each of them. Each email is mostly identical and points to the same URL. Just like the protest mail.
There was also a lot of bulk mail being sent with that URL in it. I’ve been talking to friends who have access to traps, and they were seeing a lot of mail mentioning occupywallst.com in their traps. This isn’t surprising, political groups have some horrible hygiene. They are sloppy with acquisition, they trade names and addresses like kids trade cold germs, they never expire anything out. It’s just not how politics is played. And it’s not one party or another, it’s all of them. I’ve consulted with major names across the political spectrum, and none actually implement best practices.
As I have often said the secret to delivery is to not have your mail look like spam. In this case, the mail looked like spam. In fact, it looked like spam that was coming from hijacked accounts as well as spam sent by large bulk mailers. I suspect there was also a high complaint rate as people sent it to friends and family who really didn’t want to hear about the protests.
To Yahoo!’s credit, though, someone on staff was on top of things. They looked into the issue and the filter was lifted within a couple hours of the first blog post. A human intervened, overruled the algorithm and let the mail out.
I bet this is one of the few times anyone has seen that Yahoo does outbound filtering. Given it’s a politically charged situation, I can see why they assume that Yahoo is filtering because of politics and censorship. They weren’t though.
More on politics, filtering and censorship.

They’re not blocking you because they hate you

It really can be your email
More on Truthout
Another perspective on the politico article

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Return Path on Content Filtering

Return Path have an interesting post up about content filtering. I like the model of 3 different kinds of filters, in fact it’s one I’ve been using with clients for over 18 months. Spamfiltering isn’t really about one number or one filter result, it’s a complex interaction of lots of different heuristics designed to answer the question: do recipients want this kind of mail?

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