aleksander kolcz eeplhkwaolcom dear colleague year planning organize online spam filtering challenge within framework ceas 2008 httpceascc part data stream competition live data evaluation data also collected advance particularly nonspam messages part data collection effort set website possible donate nonsensitive legitimate email used evaluation kind email recipient considers legitimate welcome including computer generated nonspam messages data collection site hosted httpceasklikaeu contribution would help great deal making ceas 2008 spam challenge success regards ceas 2008 organizing committee aleksander kolcz andrej bratko barry leiba tobias scheffer ceasannounce mailing list hwgfqazypeenlistsstanfordedu httpsmailmanstanfordedumailmanlistinfoceasannounce tue 05 aug 2008 205409 0800 call nonspam data ceas 2008 filtering challenge