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Email Encryption, Single Use

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Protect the privacy of your email with Trend Micro Email Encryption Client and ensure confidential information is delivered securely. You can send and receive encrypted email messages using Trend Micro Email Encryption as easily as you can send and receive regular email.

What It Does

Trend Micro Email Encryption Client is a plug-in for Microsoft Outlook that enables secure, confidential and private email communications between you and any of your Outlook contacts.

Since regular email is transmitted “in the clear,” it is vulnerable to interception and eavesdropping on the internet and by online email providers such as Gmail, Hotmail and Yahoo! Mail.

Safe, secure, and free for non-commercial use, Trend Micro Email Encryption Client ensures that no one except you and your recipients can read your encrypted email messages and attachments.

Simply click the “Send Private” button from Outlook to encrypt your email message and any attachments with 256-bit AES, the same encryption standard approved for used by US government agencies.

Download User Guide (PDF)

System Requirements and Compatibility

Compatible Operating Systems

  • Microsoft™ Windows™ 2000
  • Windows XP
  • Windows Vista Ultimate, Business, Home Premium, Home Basic

CPU and Memory

  • Intel™ Pentium™ 800 MHz or better
  • 256 MB memory minimum, 512 MB recommended

Required Disk Space

  • 15 MB available for installation

Compatible Web Browsers

  • Internet Explorer 6.x or better
  • Firefox 1.5 or better

Compatible Email Clients

  • Outlook XP
  • Outlook 2003
  • Outlook 2007
  • Outlook Express 6

Internet connection required for encryption key distribution, configuration, and automatic updates.


These free antivirus services are provided on an "AS IS" basis. Trend Micro reserves the right to change the terms of this free antivirus site offerings without advance notice. Trend Micro also reserves the right to refuse service to any Web site at its sole discretion. For more information, please see our legal notice.

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