[CentOS] Ban this idiot spamming the list

Sat Mar 11 21:49:44 UTC 2006
Jim Smith <jim_smith2006 at yahoo.com>

This idiot nayeem@ gulfnetksa.com is spamming the list, can he be banned?

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com