Spam now accounts for 65% of all email worldwide, and up to one-fifth of spam is malicious. The Necurs botnet, which has been used to spread Locky ransomware and Dridex, is the main driver of the spam spike. Some 75% of organizations have been infected via adware, according to Cisco. Security pros say they can only investigate 56% of the security alerts they receive each day. Nearly 45% of security operations managers say they receive 5,000 security alerts per day.”]
Source: https://www.darkreading.com/cloud/spam-now-makes-up-nearly-two-thirds-of-all-email