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Frequently Asked Questions (FAQs) about Trend Micro Encryption for Email (TMEE)

    • Updated:
    • 10 May 2021
    • Product/Version:
    • Encryption for Email
    • Platform:
    • Windows 2000 Server
    • Windows 2003 Standard Server Edition
    • Windows 7 32-bit
    • Windows 7 64-bit
    • Windows Vista 32-bit
    • Windows Vista 64-bit
    • Windows XP Home
    • Windows XP Professional
Know the answers to the common queries about Trend Micro Encryption for Email (TMEE).

An email is sent in a readable format across the Internet via your own network and other people's public networks. This makes your email easily intercepted, read, and even changed.

Securing your data from point A to point B is both necessary and desirable. However, any security measure you take becomes worthless unless your data can also be private in the transit from A to B. TMEE ensures that only the intended recipient can read your email and attachment.

You need to register first to TMEE before you can use the product. Likewise, first-time email recipients of EEC-encrypted mails will be asked to register first before they can open the encrypted mail.

You are required to follow the registration process in order to prove that you own your email address. TMEE is based on a technology called Private Post, which uses your email address to uniquely identify you. For your protection, Trend Micro only allows people to use TMEE after proving that they own their email address. Privacy is guaranteed as Trend Micro will never share this information with anyone else.

Everyone can use it. If you are the first person to send a friend an encrypted email message, your friend can either download the TMEE software after receiving your email or use the TMEE Zero Download option.

Yes. Most of the time, the content of the attachment is more sensitive and confidential than the text in the body of the email. TMEE encrypts all attachments including Word documents, spreadsheets, presentations, photographs, etc.

Yes, you can use a registered email address on two or more computers. For example, you can use TMEE on both your home and work computers. For more details, refer to the article Using TMEE on Multiple Machines.

When you installed the TMEE and registered your address, you can decrypt a message by double-clicking it in Microsoft Outlook or Outlook Express. However, messages are not decrypted on the preview or reading pane.

The TMEE toolbar appears in Microsoft Outlook after installing the software and completing your email registration by clicking the link in the activation email.

If the toolbar is not visible in Outlook:

  1. Open Outlook.
  2. Right-click a blank area alongside the toolbars to display the list of toolbars available in Outlook.
  3. Click Email Encryption Client Main Bar.

    Email Encryption Client Main Bar

If the toolbar is still missing, do one of the following:

For Outlook XP/2003:

  1. Go to Help > About.
  2. Click Disabled Items.
  3. Select ppOutl.dll in the list.
  4. Click Enable.
  5. Click Close, and then click OK.

For Outlook 2007:

  1. Go to Tools > Trust Center.
  2. Click Add-ins.
  3. Go to Manage drop-down box at the bottom of the screen, and select Disabled Items.
  4. Click Go.
  5. Select ppOutl.dll in the list.
  6. Click Enable.
  7. Click Close, and then click OK.

If the toolbar still does not appear:

  1. Look for the Encryption Client tray tool, which is the red padlock icon, on the taskbar.

    Encryption Client tray tool

  2. Right-click the icon and click Check for Updates.

    Check for Updates

  3. Check if the toolbar appears. If not, uninstall TMEE, and then install it again.

If the issue persists, contact Trend Micro Technical Support.

No. Trend Micro never handles, transports, or stores the actual content of the email messages that are being secured with our technology. When you send your TMEE-encrypted email, it travels from the sender to the recipient in a normal way without being perted to our key server. The key server is responsible only for key handling which, for security reasons, is entirely separated from the transmission of the email itself.

After the registration process, the actual keys are submitted from the key server to the TMEE product using an encrypted two-part transmission process. The registered email address will be locked to the PC that registered it. All these are done automatically in the background.

The technology of TMEE is called Private Post, which uses the Sakai Kasahara Key Exchange Mechanism (SK-KEM). SK-KEM is a set of densely intricate mathematical algorithms for exchanging the local and global keys that make encryption possible.

Private Post technology encrypts data from end to end. During transit, the contents of email messages, including attachments, are encrypted using military grade advanced encryption standard (AES) with 256-bit keys. The unique AES key of each message is encrypted using our SK-KEM technology. When an email is at rest, it can only be decrypted using the SK-KEM key secured on the computer of the intended recipient using a passphrase known only to that user.

The only way to read Private Post messages is to be the intended recipient.

By default, TMEE files are installed in the C:\Program Files\Trend Micro\Email Encryption Client. However, you can change this location by selecting the Advanced option on the License screen during installation.

Some encrypted emails may initially be treated as spam or junk mail, including your initial registration email. If you are experiencing delays in receiving encrypted emails, check your junk mail or anti-spam folder in the following location:

For Outlook 2003:

Junk Email in Outlook 2003

For Outlook Express 6:

Bulk Mail in Outlook Express 6

For Mozilla Thunderbird:

Junk Email in Mozilla Thunderbird

You can also configure future encrypted emails by selecting the email in the Junk Mail folder, and marking the mail as Not Junk.

For Outlook 2003 and 2007: Click Actions > Junk Email > Mark As Not Junk.

Mark as not junk in Outlook 2003 and 2007

For Mozilla Thunderbird: Click Message > Mark > As Not Junk.

Mark as not junk in Mozilla Thunderbird

You can register your email address and decrypt messages using your Internet browser. Simply open the Encrypted_Message.htm attachment and follow the instructions. To know how it works, refer to the article Using Zero Download.

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