Purchase and use Trend Micro Email Encryption Client.
For more information visit http://us.trendmicro.com/us/products/enterprise/email-encryption/
Use a web browser. Recipients of encrypted messages who are not using Email Encryption Client receive an email notification that provides a website link that allows the recipient to view the content of the message.
It is not possible to decrypt messages with Microsoft Outlook Web Access 2007.
Below is a sample encrypted email notification message:
The Open my email function may not work reliably with some web-based email systems. If the button does not work, the customer can save the attachment to a local computer and then open it again.
Recipients only need to register once. After registering with the Email Encryption service, the recipient will be able to view decrypted email in a browser window by clicking Open my email.