Do you have problems with spam? I would suggest you blog the IP or the country instead. Or do you mean for sending them email?
I love to help out you out but please read this first Have you tried to install in a root domain? Have you tried to Resave permalinks? Have you tried to disable all plug in? Have you tried the default theme of Wordpress?
++ If the issue is fixed consider closing the thread and change to solved, thank you for helping us helping you. ++