1. A method of attracting and harvesting spam messages, the method comprising: simulating, by one or more processors, a message relay server; receiving, by the one or more processors, one or more messages for the message relay server; relaying, by the one or more processors, to its target destination, a first message that is included in the one or more messages based, at least in part, on a determination that a pattern of the first message matches, at least in part, a first identification pattern for probe messages; capturing, by the one or more processors, for a relayed probe message, a second message that originated from an IP address of the relayed probe message; and processing, by the one or more processors, the one or more messages and the second message to generate an identification pattern that identifies potential spam messages.