Ask HN: Can't Find Old Post

A few weeks ago there was a post on the homepage about companies who are making money through selling advertising space in email newsletters. I have search all over and can't find it. I was wondering if anyone else remembered this article and any other information that would help me find this article. The articles angle seemed to be that how in a web 2.0 world that companies were making money the old fashioned web way. It also talked a lot about how email newsletter CPMs are much higher than banner ad CPMs Thanks.