PHSDL is Spam Filter technology against Malware domains, comments and posts on forum and blogs.
This chart represents PHSDL Spam Filter web usage trends over a historical time period on a large selection of website homepages queried by BuiltWith. See the FAQ for more information.
We know of 5,067 sites using PHSDL Spam Filter, download website list.
The usage trends within the top million sites are updated once per week with the last update occurring on 18 May 2012.
For more information about PHSDL Spam Filter visit http://www.phsdl.net.