One of my friend he's famous guy another one sending email to others with character assassination of that my friend. That friend told me he want to trace him how can i do that ? Please advice
Ok, I'm assuming you have a famous friend, and someone is emailing bad things? I'm not sure what country you live in so we would not be able to advise you on your laws. If you look up the laws of your country and (best to have your famous friend consult a lawyer) you will find out if there is anything you can do. Thats called slander in the US and you can sue the person. However, I'm only familiar with US Laws. And if its email, there may be certain privacy issues about it. If they send an email a website you own and you have SSH access you'd be able to trace it back to where they are sending it from. But, in the world of web proxys and anonymous free email accounts theres not really much that can be done about it.