On October 16, the Department of Homeland Security announced that it would require federal agencies to implement DMARC and STARTTLS on their email-sending domains within 90 days. The directive only applies to the U.S. federal executive branch, it will have far wider effects. In the past month and a half, executives in finance, health care, and other fields are looking at securing their email systems the same way the federal government is. This directive comes at a good time, the Internet is facing a historic explosion of phishing attacks and email impersonation exploits.”]
Source: https://www.csoonline.com/article/3241810/dmarc-is-now-an-essential-part-of-internet-security.html