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Hi Anver not all crawlers act the same, but in theory your blocks should work you can test it at phpWeby.com with different user agents.. Just an FYI I just hit ...kis.com/EmailaFriend.asp?ProductCode=HO_Wakeskis And was told it was able to be crawled by line 1 of robots.txt Looking at your robots.txt file I see user-agent:* listed twice. Also another solution in addition to blocking with robots.txt would be to include the rel="canonical" tag to the root page therefor pointing all dynamic urls back to EmailaFriend.asp Hope that helps, Don