Using a personal email address for business is an all-around bad idea, regardless if you are a CSO or the Secretary of State. Using personal email accounts bypasses all security and access controls that may be in place. It also makes data retention, compliance with regulations, and discovery nearly impossible. This story is a cautionary tale to remind us that CSOs and other business leaders should periodically look into the basics of how their firm facilitates communication and whether there are any bad habits that increase risk exposure.”]
Source: https://www.csoonline.com/article/2894232/why-the-hillary-clinton-email-story-is-a-big-deal.html