CloudComputingForAll.com: "Spam has plagued e-mail users since its inception. Users obtain a brand new e-mail address only to be pummeled with spam and phishing campaigns usually within a matter of hours. Without fail, cybercriminals seem to have access to a never-ending supply of e-mail addresses and other personally identifying information to fuel spam, phishing and malware activities. That isn’t by accident. One of the ways cybercriminals can tap into that bottomless well of personally identifying information is through a Directory Harvesting Attack (DHA)."