IBM X-Force has been beating the drum for years on the hazards of spam. Most spam is created by for-profit operators who can attach malware to the spam message to infect networks. IBM identified as the source of 23.5 percent of attacks in 2014. The bright side for your organization is that spam has been around for such a long time that there are some solid practices to combat it, but there are no easy ways to minimize the threat to your organization. It’s your people in the chain: Its your people, not technology, if not.”]
Source: https://securityintelligence.com/no-one-expects-a-spam-ish-imposition/