Email remains one of the most popular methods of communication, particularly for business communications. There were 316.9 billion emails sent and received every day in 2021, and this is set to increase to 376.4 billion by 2025. But despite the scale of its use and how much people exchange confidential information over email, it is not a secure system by design.
Consequently, email is a major attack vector for organisations of all sizes. Deloitte found that 91% of all cyber attacks originate from a phishing email (an email that attempts to steal money, identity or personal information through a spoof website link that looks legitimate). The cost to organisations can be catastrophic with the National Cyber Security Centre (NCSC) reporting in August 2021 that phishing email attacks had cost UK organisations more than £5 million in the past 13 months.