Other Secure Email Domains — List of email domains that don't require the use of Send Secure

Mass General Brigham's mail servers are configured to automatically send and receive email securely with the companies listed in Other Secure Domains If your recipient's email address ends in one of the domains listed at this site, you will not need to use Send Secure to encrypt your message.  In fact, if Send Secure is added to the subject, it will be ignored.  

Some companies may have multiple mail domains, so please verify your recipient's mail domain is listed here before sending your message.

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Cisco Secure Email Encryption Service (Send Secure) Frequently Asked Questions | FAQs

About the Cisco Secure Email Encryption Service (Send Secure)

Go to KB0014024 in the IS Service Desk