E-Mail Filtering Of Spam Sites

[Pony99CA]

I'm trying to block any E-mail containing URLs to Russian, Chinese and Indian sites. I thought that the following regexp would catch most of them:

 

http://('>http://([a-z0-9_+-]+\.)*[a-z0-9_+-]+\.(ru|in|cn)

 

However, for some reason, it also blocks http://www.billrussel.com which I don't want. i've tried various permutations, like:

 

http://([a-z0-9_+-]+\.)*[a-z0-9_+-]+\.(ru|in|cn)\b

 

which also generated false positives.

 

What's a good regexp to use that works both within text and at the end of text?

 

Thanks for any help,

 

Steve