27. A computer program product comprising a non-transitory computer useable medium including control logic stored therein, the control logic enabling the filtering of messages received by a first user, and the control logic, if executed, causing a processor to perform operations comprising: determining whether an address of a sender of a received message matches an entry on a positive screening list of a second human user, wherein the second human user is identified as trusted by the first user; applying a broad approval process to the received message, wherein each sender address and each recipient address in a header of the received message is added to the positive screening list during the broad approval process, if the address associated with the sender of the received messages matches an entry on the positive screening list; and applying the broad approval process to a subsequently received message if the sender address in the subsequently received message matches an entry on the positive screening list of the second human user.
27. A computer program product comprising a non-transitory computer useable medium including control logic stored therein, the control logic enabling the filtering of messages received by a first user, and the control logic, if executed, causing a processor to perform operations comprising: determining whether an address of a sender of a received message matches an entry on a positive screening list of a second human user, wherein the second human user is identified as trusted by the first user; applying a broad approval process to the received message, wherein each sender address and each recipient address in a header of the received message is added to the positive screening list during the broad approval process, if the address associated with the sender of the received messages matches an entry on the positive screening list; and applying the broad approval process to a subsequently received message if the sender address in the subsequently received message matches an entry on the positive screening list of the second human user. 28. The computer program product of claim 27 , wherein the operations further comprise: storing a plurality of received messages in a quarantine folder if the address associated with the sender of each message does not match an entry on the positive screening list.