The robots.txt file is also called the robots exclusion file. Basically, you use it to tell spiders which pages and directories you do NOT want to see indexed. The exception to this is an optional directive that can be used to tell spiders where to find an XML sitemap.
A very basic robots.txt file would be:
Code:
User-agent: *
Disallow: /images/
This tells all spiders (* = wild card) to exclude the images directory from their index.
You can learn more about it at the following sites:
http://www.tech-evangelist.com/2008/10/18/robotstxt/
http://www.robotstxt.org/
The robots.txt file must be placed in the root directory.
There site also said the HTTP compression and HTTP conditional GET are not enabled.
Whose site said these were not enabled? There is no need to use HTTP compression or HTTP conditional GET. MSN does have problems indexing sites using compression techniques.
I would not worry too much about MSN. It typically drives less than 5% of all web traffic. Google and Yahoo are much more important.