Email security focuses on preventing malicious activity such as phishing attacks, ransomware, crypto-jacking scripts, and privilege escalation exploits. Most organizations have a formal email policy that outlines employee responsibilities, brings-your-own-device guidelines, attachment guidance, and other rules.
Less well-known are three mutually reinforcing email authentication protocols (SPF, DKIM, and DMARC). These solutions protect from spoofing attacks.
Authentication
Email authentication protects a business’s reputation, brand, and customers from phishing attacks. Without it, cybercriminals can forge emails to appear as if they are coming from you or your company, which can deceive recipients into clicking on links or downloading attachments that contain malware.
from StartUp Mindset https://startupmindset.com/the-importance-of-implementing-email-security-protocols-in-corporate-environments/
Austin Rotter 