"Google is updating Gmail to allow enterprise users to send encrypted messages to any inbox in just a few clicks. Google says it’s developed a new encryption model that, unlike the current encryption feature on Gmail, doesn’t require senders or recipients to use custom software or exchange encryption certificates.
The feature is rolling out in beta starting today, and will initially be available for Google enterprise users to send encrypted emails to other Gmail users within the same organization. Google says this will expand to emails sent to any Gmail inbox “in the coming weeks,” and to inboxes from any third-party email provider “later this year.”
Gmail’s current encryption feature, based on the Secure/Multipurpose Internet Mail Extensions (S/MIME) protocol, can already be used to send external emails. Doing so requires the recipient to have S/MIME configured and complete multiple steps with the sender before emails can be securely exchanged, however."
https://www.theverge.com/news/640422/google-gmail-email-encryption-enterprise-beta
