Answer Description
The employees are receiving advertisements and other mail unrelated to them, this is known as spam or junk mail. Whaling and Phishing attempts to trick users into providing confidential data. Bluesnarfing is the unauthorized access of data through Bluetooth.
Wikipedia
Email spam, also referred to as junk email, is unsolicited messages sent in bulk by email (spamming) The name comes from Monty Python sketch in which Spam is ubiquitous, unavoidable, and repetitive Email spam has steadily grown since the early 1990s, and by 2014 was estimated to account for around 90% of total email trafficSince the expense of the spam is borne mostly by the recipient, it is effectively postage due advertising This makes it an excellent example of a negative externalityThe legal definition and status of spam varies from one jurisdiction to another, but nowhere have laws and lawsuits been particularly successful in stemming spam
Email spam - Wikipedia, the free encyclopedia