Here's a query that shows efreedom above SO. I did site:efreedom.com and picked few titles until I found one.

query: Mailengine with .NET API

The right page that should show up is

http://stackoverflow.com/questions/1720900/mailengine-with-n...

If you google the link below you'll see that the page is indexed.

http://stackoverflow.com/questions/1720900/mailengine-with-n...

However, the page doesn't show up when you use the query I mentioned.