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All effective spam filters use DNS blacklists or blocklists, known as DNSBLs. They provide an efficient way to publish sets of IP addresses from which the publisher recommends that mail systems not accept mail. A well run DNSBL can be very effective; the Spamhaus lists typically catch upwards of 80% of incoming spam with a very low error rate. DNSBLs take advantage of the existing DNS infrastructure to do fast, efficient lookups. A DNS lookup typically goes through three computers... more
I'm sure many of you are familiar with the targeted ESP phishing attack that has been ongoing for almost a year now and has led to multiple known ESP system breaches. Return Path was recently a victim of this same attack... In short, a relatively small list of our clients' email addresses was taken from us, meaning those addresses are now the targets of the phishing campaign that are intended to compromise those client systems. more
On Monday, Facebook announced that they were introducing a new messaging platform. Facebook is careful to point out that this is not a replacement for email; it is not email, so they claim. So what is it? This messaging platform is basically a way to talk to people outside of Facebook from Facebook... Essentially, independent of the platform, you can still use the feature. It's kind of like everything Java promised in the 1990's -- it runs on Windows, the Mac or Unix. more
Funny as it may seem, today there's big news in the email industry -- 2 large internet bodies, 2 projects... Projects Phoenix and Titan, by AOL and Facebook respectively. What are key things to note about each project? Let's look at each in brief detail... more
A few issues may affect some senders/outbound mail across the email industry this week... A few folks in the industry said they saw false positives of RLY:B1 blocks since Monday the 8th. If you notice these, ensure you follow necessary procedure: check to see all is good on your end, and then submit a support ticket to AOL's postmaster group. more
A small company in suburban Philadelphia called Holomaxx recently filed two lawsuits against large webmail providers, complaining that they weren't delivering mail from Holomaxx. The first suit is against Microsoft and Return Path, and the second suit is against Yahoo and Cisco/Ironport. Neither is going anywhere. more
As an email policy wonk, I think a lot about how specific policy implementations can go wrong. Sure, every policy can go wrong, or not fit a common case. A lot of people only write polices that address common cases and don't worry about the rarer cases. The problem is there are some rare cases that may cause significant harm and those cases should be addressed. Consumerist has a case up about email policy gone wrong with a clear path to harm but no policy for handling the issue. There are a couple places I see where this policy hole can be fixed. more
Apparently, along with trying to change who gets paid when the music gets played, the National Association of Broadcasters is lobbying Congress to require FM radio receivers to be built into phones and other mobile devices. I'm sure this is in part a reaction to the rise of streaming music apps like Pandora and the Public Radio Player, but they want FM receivers in not-so-smart phones too. more
A friend of mine wrote to ask: "The Supreme Court overturned the Jaynes conviction on First Amendment grounds, yes? I'm wondering what that could mean from the spam filtering perspective." Spam filters, and in particular DNS blacklists are intended to prevent e-mail from being delivered. Doesn't the First Amendment make it illegal to block speech? The short answer is no, but of course it's slightly more complicated than that in practice. more
As Reddit recently learned it's not a great idea to use the Amazon EC2 cloud to host mailservers. There are a number of reasons for this, most of them related to the reputation of mail coming from EC2 servers. When you're using machines in the cloud, changing IP addresses is as simple as initializing a new server. Spammers discovered this almost as soon as the EC2 cloud became public. more
Last month a bill in the Israeli Knesset would have required ISPs to provide portable e-mail addresses, analogous to portable phone numbers that one can take from one phone company to the other. As I noted at the time, e-mail works differently from telephone calls, and portability would be difficult, expensive, and unreliable. So I was wondering, idly, if we really wanted to provide portable e-mail addresses, how hard would it be? more
The 2010 version of the now-annual Messaging Anti-abuse Working Group (MAAWG) 'Email Security Awareness and Usage Report' was released yesterday. While un-belied by the title, the vernacular name might get a bit more attention: "The MAAWG Consumer Email Survey". ... Consumers were surveyed in North America and across Europe with variety of questions from computer expertise and savvy, to their preferences of email. more
The highest court in Germany has ruled against telephone and email data retention used to track criminal networks. Melissa Eddy of the Global and Mail reports: "A law ordering data on calls made from mobile or landline telephones and e-mail exchanges be retained for six months for possible use by criminal authorities violated Germans' constitutional right to private correspondence, the Federal Constitutional Court ruled. In its ruling, the court said the law failed to sufficiently balance the need for personal privacy against that for providing security."
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The email portability bill has just been approved by the Knesset's committee for legislation, sending it on its way for the full legislation process of the Israeli parliament. While many users own a free email account, many in Israel still make use of their ISP's email service. According to this proposed bill, when a client transfers to a different ISP the email address will optionally be his to take along, "just like" mobile providers do today with phone numbers. more
There have been a number of reports recently about customer lists leaking out through Email Service Providers (ESPs). In one case, the ESP attributed the leak to an outside hack. In other cases, the ESPs and companies involved have kept the information very quiet and not told anyone that data was leaked. People do notice, though, when they use single use addresses or tagged addresses and know to whom each address was submitted. Data security is not something that can be glossed over and ignored. more
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