A lot of organizations have this feature where the user can encrypt the message that they are sending for privacy. Some users have reported seeing the following error ...

If the STARTTLS encryption for the outgoing server is not working or unavailable for any reason, you can use the following encryption: Encryption: SSL/TLS Port: 465 For your information, setting up ...

With this update, Gmail users with client-side encryption can send E2EE emails to people using other providers, like Outlook.

You can now send fully encrypted emails from Gmail to recipients on Outlook or any other third-party email provider.