I have also received a message from bongolante7 - these people are very dangerous criminals.
"The money laundering scam – also known as the Nigerian scam – is a quite old scheme and most of us have already encountered it in a form or another in his own e-mail inbox.
Since it is an old scam, it has encountered multiple variations along the years. The typical scam starts when you receive an e-mail message where you are asked by an official government member, a businessman or the member of a wealthy family, usually a woman, to provide help in retrieving a large sum of money from a bank, paying initially small fees for papers and legal matters. For the services performed, you are promised a very large sum of money.
Of course, this is just the beginning. Eventually you are requested to pay more and more for other additional services, such as transactions, transfer costs, etc. You even receive papers that are supposed to make you believe that all this is “real“. In the end, you are left broke and without any of the promised money.
We have to mention here the cases where not only money were lost in the process, but sometimes people have been kidnapped or even worse."