Spam

ClamAV and the Case of the Missing Mail

Some email discussion lists were all atwitter yesterday, as Sourcefire's open-source anti-virus engine ClamAV version 0.94.x reached its end-of-life. Rather than simply phase this geriatric version out the development team put to halt instances of V0.94 in production yesterday, April 15, 2010. In other words, the ClamAV developers caused version .94 to stop working entirely, and, depending upon the implementation, that meant email to systems using ClamAV also stopped flowing. more

Spam Volume Redux

Several anti-spam companies talk about spam volumes in terms of a percentage of all inbound mail. Outsourced anti-spam services such as BlackSpider and Postini are currently quoting spam volumes in the 70%-85% range, having steadily grown over the last two+ years. That's nice, but it's actually hard to grasp what that means in absolute terms. more

AOL and Goodmail: Two Steps Back for Email, Part II

There's been a lot of noise this week since the news broke about AOL and Goodmail, so I thought I'd take the opportunity to change the direction of the dialog a little bit. First, there are two main issues here, and I think it's healthy to separate them and address them separately. One issue is the merits of an email stamp system like the one Goodmail is proposing, relative to other methods of improving and ensuring email deliverability. The second issue -- and the one that got me started earlier this week - is the question of AOL making usage of Goodmail stamps a mandatory event, replacing its enhanced whitelist. more

The Future of Email

While people may debate the death of email, there is no question that many email servers are already overloaded with spam. Current spam solutions are beginning to address the problem, but so far they all suffer from the arms race issue - as fast as we come up with new ways to fight spam, spammers are finding new ways to deliver it to us. While the functionality of email will certainly continue, the current system must change. When the change comes, it will deliver the future of email to Microsoft. more

What’s in a Name?

Internet domain names are truly bizarre. There is nothing especially remarkable about them from a technical perspective, but from a social and political perspective they are all sorts of fun. We can have arguments over control of the DNS root, arguments over whether names are property, arguments over innate rights to specific names, arguments over a registrar's right (or lack thereof) to exploit unregistered names for private gain, and many more arguments besides. In this article, I'd like to explore the argument-space rather than defend any particular position in it. In so doing, I hope to illuminate some novel (or under-emphasised) perspectives on the matter. more

Using Whois to Enforce Law?

Before starting I'd like to remind you that there are two distinct Whois systems -- the one for IP address delegations and one for DNS registrations. I believe that the former is a useful system in which there are clear utility values that outweigh the privacy costs, and in which the person whose privacy is exposed has made a knowing choice. I do not believe that these arguments apply to the latter, the DNS, form of Whois. more

What’s Driving Spam and Domain Fraud? Illicit Drug Traffic

Spam is not about who sent it, it's about who benefits from it. For a moment forget everything you know about filters, zombie PCs, firewalls, spoofing, viruses, beisyan algorithms, header forgery, botnets, or blacklists. These are all methods for sending spam or preventing spam delivery. None of these explain why spam is sent and for far too long all the attention has been paid to the effects and not the driving force. Under the endless onslaught of junk mail it is easy to feel that the goal of the game is send spam and annoy us all. more

ICANN’s First Official Report on Whois Data Problems

ICANN has submitted the first report of what will be a series of annual reports summarizing its "expierince" with the Whois Data problems and inaccuracies. While emphasizing that "ICANN-accredited registrars are obligated by the terms of their accreditation agreements to investigate and correct any reported inaccuracies," the report provides the following conclusions: more

MARID is Dead

As long suspected by some, the IETF is going to be closing up the Mail Transfer Agent Authentication in DNS (MARID) Working Group according to today's post by Ted Hardie, co-AD for Applications. Larry Seltzer of eWeek was right on target about this: "The rest of the SID standards process will now be a waste of time thanks to Microsoft, and the other participants will afterwards pick up the pieces and get the job done with another spec." more

80% of Spam Originating from Home PCs

The majority of spam -- as much as 80 per cent of all unsolicited marketing messages sent -- now emanates from residential ISP networks and home user PCs. This is due to the proliferation of spam trojans, bits of surreptitious malware code embedded in residential subscriber PCs by worms and spyware programs. Worm attacks are growing in frequency because they provide a fast means of infecting a vast number of computers with spam trojans in a very short period of time. It's no surprise that many service providers report an upsurge in spam traffic immediately following a worm attack. more

More than 99% of Email is Spam?

One of my pet peeves is the headline "n %" of email is spam, it is inherently misleading, and conveys no useful data. I guess it makes for great newspaper headlines then! On our servers looking at one email address for 4 hours, we saw 208 attempted connections for SMTP traffic referring to this email address. ...One can't measure spam in relation to the amount of genuine email, because the amount of genuine email is not connected to the amount of spam... more

J.D. Falk: 1974 - 2011

It is with great sadness that we announce the passing of Jesse David (J.D.) Falk, a highly regarded and long time contributor to CircleID. more

There Is No “Spam Problem”

This month I thought I could feel smug, deploying Postfix, with greylisting (Postgrey), and the Spamhaus block list (SBL-XBL) has reduced the volume of unsolicited bulk commercial email one of our servers was delivering to our clients by 98.99%. Alas greylisting is a flawed remedy, it merely requires the spambots to act more like email servers and it will fail, and eventually they will... more

Is Industry Underestimating the Ending Dot?

According to RFC1034, "cnn.com" and "cnn.com." should be the same domain names. However, it doesn't appear that programmers always understand that trailing dots can be added to domain names. Web servers also can't seem to agree what to do with a period at the end of a host name. IIS, thttp, and Akamai's Web server all get confused while Apache doesn't seem to care. How much other software behaves incorrectly because of a trailing period on a domain name? Can spam-filtering software be bypassed with dotted email addresses? Here is a situation when bad things can happen -- "WebShield SMTP infinite loop DoS Attack"... more

With No Privacy Standards Who Knows Who Is Abusing The Whois Database

John Banks is a loan officer in New York. John's supervisor recently warned John about the potential number of bad loans he may be carrying as part of his portfolio. To dump some of the bad loans he might be carrying, John came up with a scheme. He pointed his web browser to www.whois.org and entered terms denoting disease or poor health such as 'cancer' and 'illness'. This query on the Internet's WHOIS database reported results of names and addresses of domain name owners who had developed websites devoted to providing information on certain serious illnesses. John compared these names and addresses with those in his portfolio of loans. For the matches, he canceled the loans and required immediate payment-in-full. more