Don’t be worried if you get an email like this. Just ignore it. It is a scam.
We are a Network Service Company which is the domain name registration center in Shanghai, China. On October,18th,2010, We received HUAXIA Company's application that they are registering the name "jtbworld" as their Internet Trademark and "jtbworld.cn","jtbworld.com.cn" ,"jtbworld.asia"domain names etc.,It is China and ASIA domain names.But after auditing we found the brand name been used by your company. As the domain name registrar in China, it is our duty to notice you, so I am sending you this Email to check.According to the principle in China,your company is the owner of the trademark,In our auditing time we can keep the domain names safe for you firstly, but our audit period is limited, if you object the third party application these domain names and need to protect the brand in china and Asia by yourself, please let the responsible officer contact us as soon as possible. Thank you!
Shanghai Office (Head Office)
Registration Department Manager
3002, Nanhai Building 854.Nandan Road
Xuhui District, Shanghai
Office: +86 0553 4994789
Fax: +86 0553 4994789
Here I later found someone doing a bit of research on this scam. Apparently this is quite an old scam and as it still is going on it must mean many are caught by it.