60. The apparatus in claim 59 wherein the handcrafted features comprise features correspondingly related to formatting, authoring, delivery or communication attributes that characterize an e-mail message as belonging to the first class.
60. The apparatus in claim 59 wherein the handcrafted features comprise features correspondingly related to formatting, authoring, delivery or communication attributes that characterize an e-mail message as belonging to the first class. 63. The apparatus in claim 60 wherein the authoring attributes comprise whether the incoming message contains an address of a single recipient, or contains addresses of plurality of recipients or contains no sender at all, or a time at which the incoming message was transmitted.