Michael Osterman: Phishing is not a new phenomenon but the growth and impact of phishing emails is substantial. The earliest known attempts at fooling victims into giving up their information dates back to about 1995. More sophisticated phishers will use corporate logos and other identifiers that are designed to fool potential victims into believing that the phishingmails are genuine. The growth is so successful that many email users are not sufficiently skeptical or discriminating about suspicious emails, often because they lack training about how to identify phishing attempts.”]
Source: https://blog.malwarebytes.com/cybercrime/2015/10/the-growing-threat-from-phishing/