gordon v cormack zixgfqeiuwaterlooca still process finalizing trec 2007 spam track guidelines interim report final guidelines end june meantime please feel free post queries comments list primary tasks use tool kit data format last year ie trec spam filter evaluation toolkit available httpplguwaterloocagvcormacspam active learning task use different version toolkit available shortly three tasks online filtering immediate feedback exactly task trec 2005 2006 online filtering delayedincompletenoisy feedback tools trec 2006 delayted feedback test data may contain train commands every message train commands may wrong simulate user underreporting user error emphasis placed correct classification large number messages feedback example may feedback last half messages online active filtering active learning different tools task trec 2006 active learning filters perform online classification two tasks allowed query true class ham spam fraction messages chosen filter effected additional command query added toolkit query message previously classified filter filters submitted nist date determined probably midjuly public corpus released results public corpus also submitted nist probably late august gordon v cormack cs dept university waterloo canada n2l 3g1 qcdjhryliuwaterlooca httpcormackuwaterloocacormack tue 05 aug 2008 195109 0400 trec 2007 spam track