Open relays

Yahoo and Spamhaus

• laura
• Industry

Yahoo has updated and modified their postmaster pages. They have also put a lot of work into clarifying their response codes. The changes should help senders identify and troubleshoot problems without relying on individual help from Yahoo.
There is one major change that deserves its own discussion. Yahoo is now using the SBL, XBL and PBL to block connections from listed IP addresses. These are public blocklists run by Spamhaus. Each of them targets a different type of spam source.
The SBL is the blocklist that addresses fixed spam sources. To get listed on the SBL, a sender is sending email to people who have never requested it. Typically, this involves email sent to an address that has not opted in to the email. These addresses, known as spamtraps, are used as sentinel addresses. Any mail sent to them is, by definition, not opt-in. These addresses are never signed up to any email address lists by the person who owns the email address. Spamtraps can get onto a mailing list in a number of different ways, but none of them involve the owner of the address giving the sender permission to email them.
Additionally, the SBL will list spam gangs and spam supporters. Spam supporters include networks that provide services to spammers and do not take prompt action to remove the spammers from their services.
The XBL is a list of IP addresses which appear to be infected with trojans or spamware or can be used by hackers to send spam (open proxies or open relays). This list includes both the CBL and the NJABL open proxy list. The CBL list machines which appear to be infected with spamware or trojans. The CBL works passively, looking only at those machines which actively make connections to CBL detectors. NJABL lists machines that are open proxies and open relays.
The Policy Block List (PBL) is Spamhaus’ newest list. Spamhaus describes this list as

Update on Yahoo and the PBL

• laura
• Industry

Last week I requested details about Yahoo rejections for IPs pointing to the PBL when the IP was not on the PBL. A blog reader did provide me with extremely useful logs documenting the problem. Thank you!
Based on my examination of the logs, this appears to be a problem only on some of the Yahoo! MXs. In fact, in the logs I was sent, the email was rejected from 2 machines and then eventually accepted by a third.
I have forwarded those logs onto Yahoo who are looking into the issue. I have also talked with one of the Spamhaus volunteers and Spamhaus is aware of the issue as well.
The right people are looking at the issue and Spamhaus and Yahoo are both working on fixing this.
Thanks for the reports and for the logs.

News snapshot

• laura
• Industry

• 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.

Read More