Your domains must be registered to the Trend Micro Encryption Email service for email encryption to work. See Registering Domains to the Encryption Service for more information.

After configuring encryption settings, IMSVA can decrypt and encrypt the messages to protect the message content.

For encrypted message traffic entering your network, IMSVA decrypts the messages automatically and scans the messages according to the policy rules you specify. Outgoing messages are re-encrypted after scanning to protect the message content.