Archive for May, 2008

  • Update on Gmail spam exploit May 27th, 2008, by dcawley

    A couple of weeks ago I made a blog post based on a SecurityFocus vulnerability report suggesting that Gmail smtp servers could be abused by spammers. At the time, the exact details of the attack were not disclosed to give Google an opportunity to respond to the claims. Since then, the INSERT security team have […]

  • Ever wonder why there are so many .info spam websites? May 26th, 2008, by dcawley

    Although it may sometimes seem that the purpose of a spammer is to try and fill your inbox with useless content, their main goal is to have a recipient perform some type of action. The “call to action” could be to click on a website URL, call or fax a number or simply send an […]

  • How to use Passive OS Fingerprinting (p0f) with Traffic Control May 26th, 2008, by ksimpson

    I was having an IM chat with a newly minted TC user recently, and the user asked me how he can enable the Passive OS Fingerprinting (p0f) trigger (link goes to our manual, PDF), which permits you to selectively slow down, block, or even whitelist senders based on their operating system type. Now, before you […]

  • Join Ken Simpson at MAAWG Europe June 10-12 May 21st, 2008, by ksimpson

    I will be co-chairing the botnet subcommittee with MXLogic’s Sam Masiello at the upcoming Messaging Anti-Abuse Working Group (MAAWG) meeting in Heidelberg Germany at 1:30pm Wednesday June 11. We will be discussing a preliminary “botnet taxonomy”. If you’re a member of MAAWG and are planning to attend Heidelberg, or if you will be in Europe […]

  • Post #9 on Why Spam Filters Suck “trickle blog” series May 16th, 2008, by d.liao

    Real World Scenarios Despite all the money invested into anti-spam solutions, spam volume continues to rise. Yes, spamming is an arms race. But the real race is one of sheer volume. Spammers respond to difficulty by simply sending more spam. Better filtering? Send more to improve numbers getting through. Spamming not profitable enough? Send more […]

  • Gmail open relay exploit? May 7th, 2008, by dcawley

    A vulnerability report posted to the BugTraq section of the SecurityFocus website suggests that Gmail smtp servers can be abused by spammers. For the moment the exact details of the attack are not being disclosed to give Google an opportunity to respond to these claims. The report gives a high level description of the vulnerability […]

  • MailChannels a finalist for the BCTIA Technology Impact Awards May 6th, 2008, by ksimpson

    The British Columbia Technology Industry Association (BCTIA) hands out awards every June at its annual barbecue to recognize companies in the region that have contributed to the advancement of the technology industry here in our corner of the world. I am pleased to announce that MailChannels has been selected as a finalist for the “Best […]

  • Customer: “My spam volume is down – is it you guys?” May 5th, 2008, by ksimpson

    MailChannels tracks (in real-time) the email flows hitting our customers worldwide. We use this data to establish a fairly comprehensive reputation score for IP addresses we have seen many times – mostly as a method for automatically “whitelisting” IPs which have a long track record of sending good email.Recently, a customer of ours asked us […]

  • Post #8 on Why Spam Filters Suck “trickle blog” series May 2nd, 2008, by d.liao

    Dealing a Blow to Spammers ISPs have recently been getting a lot of criticism for traffic shaping P2P file sharers. While we can argue over whether this is excessive or not, they have been doing this primarily for legitimate reasons, to reduce the impact of resource hogging users on the rest of their network. The […]