It often concerned some inheritance from a long lost relative in the outer reaches of Africa - and would usually be written by the housekeeper! They're obviously sending it to many thousand of people hoping that somebody falls for it and replies. It clearly work because they keep doing it. This morning - whilst trawling the net I found this. It's the best one yet!!! Black hole imminent. Hilarious!
They'd never dare send it to me - because if they knew me they certainly wouldn't want me to contribute to a breeding programme to safeguard the future of the human race.