Recent Posts

Traffic Light Protocol

If you’re sharing sensitive computer security information it’s important to know how sensitive a document is, and who you can share it with.
US-CERT and many other security organizations use Traffic Light Protocol as shorthand for how sensitive the information in a document is. It’s simple and easy to remember with just four colour categories: Red, Amber, Green and White. If you’re likely to come into contact with sensitive infosec data, or you just want to understand the severity of current leaks, it’s good to know that it exists.

Ask Laura: Is it spam?

Google takes on intrusive interstitials

Starting next January, Google will be modifying its mobile search results to lower the ranking of sites that use interstitials that interfere with the users experience. In a blog post announcing the change they explain:

Open subscription forms going away?

A few weeks ago, I got a call from a potential client. He was all angry and yelling because his ESP had kicked him off for spamming. “Only one person complained!! Do you know him? His name is Name. And I have signup data for him! He opted in! How can they kick me off for one complaint where I have opt-in data? Now they’re talking Spamhaus listings, Spamhaus can’t list me! I have opt-in data and IP addresses and everything.”
We talked briefly but decided that my involvement in this was not beneficial to either party. Not only do I know the complainant personally, I’ve also consulted with the ESP in question specifically to help them sort out their Spamhaus listings. I also know that if you run an open subscription form you are at risk for being a conduit for abuse.
This abuse is generally low level. A person might sign up someone else’s address in an effort to harass them. This is a problem for the victim, but doesn’t often result in any consequences for the sender. Last week’s SBL listings were a response to subscription abuse happening on a large scale.

Gmail showing authentication results to endusers

A bit of older news, but worth a blog post. Early in August, Gmail announced changes to the inbox on both the web interface and the android client. They will be pushing authentication results into the interface, so end users can see which emails are authenticated.

These are not deliverability changes, the presence or absence of authentication will not affect inbox delivery. And the gmail Gmail support pages clarify that lack of authentication is not a sign that mail is spam.
This isn’t a huge change for most ESPs and most senders. In fact, Gmail has reported more than 95% of their mail is authenticated with either SPF or DKIM. Now, Gmail does a “best guess” SPF – if it looks like an IP should be authorized to send mail for a domain (like the sending IP is the same as the MX) then it’s considered authenticated.
It’s good to see authentication information being passed to the end user.

Ongoing subscription attack

Brian Krebs posted a couple days ago about his experience with the subscription bomb over the weekend. He talks about just how bad it was over the weekend.

Spamhaus comments on subscription attack

Steve Linford, CEO of Spamhaus commented on my blog post about the current listings. I’m promoting it here as there is valuable information in it.

Improving Outlook Email Display

Today Litmus announced they had partnered with Microsoft to fix many of the rendering issues with Outlook. Congrats, Litmus! This is awesome. I know a lot of folks have tried to get MS to the table to fix some of the problems with Outlook. Take a bow for getting this off the ground.
According to Litmus, the partnership has two parts.

Subscription bombing, ESPs and Spamhaus

A number of ESPs woke up to a more-than-usually-bad Monday morning. Last night Spamhaus listed 10s of networks, including ESPs, on the SBL. The listings all contained the following note: