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Intelligence Briefings from the War on Spam

Archive for the ‘Internet Service Providers’ Category

Twenty Years of Spam


Friday, April 11, 2014 by Andrew Conway

April 12th is the 20th anniversary of the first large scale commercial spam – the infamous “Green Card Lawyers” message that was posted to every newsgroup on Usenet News (right). Though there were attempts at spamming starting as early as 1978, they went out to hundreds of users rather than the hundreds of thousands that […]

Botnets: Does Size Matter?


Monday, March 18, 2013 by Andrew Conway

Every so often the command and control servers for a botnet get taken down, and we are told breathlessly by the more extravagant security experts that this botnet was responsible for a quarter (or a half or a third) or all the world’s spam, and that we can expect to see a big reduction in […]

Stopping Email Abuse in IPv6 Networks


Tuesday, June 05, 2012 by Kevin San Diego

Many service providers, network providers, and corporations plan to launch additional IPv6 networks and on-line services during this year’s World IPv6 Day, which falls on June 6th, 2012. IPv6 promises to enable deployment of a seemingly endless number of networks and devices.  IPv6 provides 128-bits of addressable space, while IPv4 only provides 32-bits.  This means […]

Who is working on WHOIS?


Monday, March 19, 2012 by Murray Kucherawy

ICANN met last week in Costa Rica, and the IETF meets next week in Paris. The one big thing these two meetings have in common is a nascent but significant push to replace the venerable WHOIS protocol, which lets one query a registry for information about the assignee of a network or the owner of […]

DKIM Helps and Hurts Google, YouTube and SalesForce


Thursday, January 26, 2012 by Murray Kucherawy

Google has been using DKIM to improve trust in mail it sends from several of its properties for some time now. Mail from Google staffers (google.com and googlers.com), from YouTube (youtube.com), from Google Groups (googlegroups.com) and from Gmail users (gmail.com) is always signed by DKIM using those respective domains as the signer. This means we […]

Highlights from IETF 82 in Taipei


Tuesday, November 29, 2011 by Murray Kucherawy

The Internet Engineering Task Force met in Taipei in mid-November. Cloudmark was in attendance, working to advance several things through the IETF processes, including a new working group that will produce protocols and advice documents relevant to reputation services (see my previous posts about DKIM and domain reputation); creation of a working group seeking advancement […]

Can Legal Action Stop Cybercrime?


Thursday, July 28, 2011 by David Romerstein

The Brookings Institute this week released a policy paper postulating the use of legal action to stop the spread of cybercrime. The author, Wired Magazine’s Noah Shachtman, speculates that new pressure from the US government on businesses to report data breaches combined with additional requirements for ISPs to be accountable for the things that happen […]

Exciting Times


Tuesday, July 19, 2011 by Murray Kucherawy

The Internet Engineering Task Force (IETF) will be meeting next week in Quebec City. The IETF, which produces the RFC document series that defines Internet standards, hosts a lot of activity that is of current interest to the messaging security community. Cloudmark is a very active participant in these processes, as a means of staying […]

Blu Monday


Monday, May 02, 2011 by David Romerstein

We’ve been following an attack against one of our North American customers for the last couple of weeks. The incoming spam is pretty typical, coming from a mix of snowshoe ranges and possibly botted single IP addresses. What’s more interesting about this attack is the URLs in the payloads. The domains all appear to be […]

The value of domain names and email


Tuesday, April 19, 2011 by Murray Kucherawy

The Internet Engineering Task Force (IETF) met last month in Prague.  Among the dozens of working groups striving to produce standards and guidelines to make the Internet work better, there is one called DKIM, or DomainKeys Identified Mail.  They’ve been working for several years to produce new email standards that can be added invisibly to […]


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