Exchange 2010 outgoing encrypted emails

My organization uses an onsite Exchange 2010 email server.

The EMS Director is concerned about email encryption when sending emails to outside recipients.
(HIPPA Compliance)

We utilize a SSL certificate (Digicert) for the Onsite Exchange Server.

Are outgoing emails encrypted with SSL and a site certificate?
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Simon Butler (Sembee)ConsultantCommented:
Short answer - no.
The most that the SSL certificate will do is wrap the email during transport in TLS encryption. However that will be decrypted by the receiving SMTP server. Furthermore that depends on TLS support at both ends and for the entire path, which you cannot guarantee.

If you want to encrypt the contents so it cannot be read at any point in the path then you either need to encrypt the email using something in the client (biggest drawback is the other side needs to have the same thing), or invest in an encryption service that provides a secure interface to read the email.

AmitIT ArchitectCommented:
By default, opportunistic TLS is used. You can setup mutual TLS with your vendor. Follow this:

If you want to set to outside world, you need to use 3rd party, like Voltage Mail Encryption.

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