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[Clare Snyder]

The definitive answer, direct from Microsoft.
Dissable RTF on your E-Mail program. Here is the scoop - from microsoft
TechNet.:

When you send mail over the Internet from a Microsoft Exchange Windows
client or an Outlook client,
     a file attachment called Winmail.dat may be added to the message.
This attachment contains the
     Microsoft Exchange rich-text information of the message being sent.
The Winmail.dat file may not be
     useful to non-Microsoft Exchange recipients. The information in the
Winmail.dat file may appear on the
     receiving end as binary information at the end of the mail message. 

     This article describes how to prevent sending the Winmail.dat
attachment to Internet users when you
     are using the Microsoft Exchange Internet Mail Connector (IMC). 

     MORE INFORMATION

     You can control whether or not to send rich-text format in any one
of the following ways: 

        1.Custom Recipients The administrator can modify an existing
Microsoft Exchange custom recipient
          to prevent rich text information from being sent to that
custom recipient by clearing the Allow
          Rich Text in Messages check box on the Advanced property page
of the recipient's properties.
          You can view the custom recipient's properties by selecting
the recipient name and then
          choosing Properties from the File menu. 

        2.Addresses in the Personal Address Book The user can modify the
Internet addresses in their
          Personal Address Book (PAB) to not be sent rich-text
information by clearing the Always Send to
          This Recipient in Microsoft Exchange Rich-Text Format check
box on the SMTP General property
          page of the Internet address in the PAB. To obtain the
properties of an entry in a PAB, select
          the entry and choose Properties from the File menu. 

        3.Configuring the Internet Mail Connector (IMC) The
administrator can configure the IMC to send
          or not to send rich-text information by following the steps
below: 

                a. Bring up the properties of the Internet Mail
Connector.
                b. Select the Internet Mail property page.
                c. Click on the button labeled Interoperability. This
should bring up

          the Interoperability dialog. d. The Send Microsoft Exchange
Rich-Text Formatting list box controls the sending of
          rich-text data. There are three values to choose from: - If
the value is set to User, the recipient's properties are
          used to determine whether or not to send rich-text
information. - If the value is set to Always, rich-text information
          is always sent, regardless of the recipient's properties. - If
the value is set to Never, rich-text information is never
          sent. You can also configure whether or not to send rich-text
information on a per-domain basis. To define e-mail
          domains and the message settings for that domain, click the
E-Mail Domain button on the Internet Mail page of
          the IMC Properties. This will bring up the Add E-Mail Domain
dialog. Click on the Add button to specify an e-mail
          domain. Click on the Interoperability button. Select a setting
from the Send Microsoft Exchange rich text formatting
          list box. 

        4.One-Off Addressing You can send e-mail to an Internet user
from a Microsoft Exchange or
          Outlook client using One-Off addressing. One-Off addressing
allows sending a message to
          addresses that are not in the PAB, the Global Address List
(GAL), or in any recipient containers.
          Depending on the type of the One-Off address used, rich-text
information is or is not sent with
          the message: 

                a. Rich-Text Information Sent:

          If the One-Off address has the following format, rich-text
information is sent with the message: [SMTP:<SMTP
          Address>] where SMTP Address is any valid SMTP address, for
example: user at domain.com To verify that rich-text
          information is sent: 1. Select the Check Names command from
the Tools menu after typing the address in the
          above format. This should display the SMTP address without the
SMTP:. The name should be underlined. 2. Bring
          up the Properties of the address by double clicking it. The
option Always Send to This Recipient in Microsoft
          Exchange Rich-Text Format should be checked indicating that
rich-text information (the Winmail.dat file) will be
          sent along with the message. NOTE: Even if you address a
message to [SMTP:<SMTP Address>], you can run the
          Check Names command, then get the properties of the resolved
recipient and unselect the Always Send to This
          Recipient in Microsoft Exchange Rich-Text Format checkbox.
This will prevent rich-text information from being sent
          along with the message. b. Rich-Text Information Not Sent: If
you use a One-Off address and you do not want to
          send rich-text information to the recipient, the address
should have the following format: <SMTP Address> where
          SMTP Address is any valid SMTP Address, for example:
user at domain.com NOTE: Unlike the address in step 4.a.
          above, the SMTP Address is not proceeded by SMTP: and the
address is not enclosed in square brackets. If you
          click the Check Names command and then get the properties of
the address, you can see that the rich-text option
          is not selected. However, no matter what option is selected
for the address of the recipient, the IMC settings
          determine whether or not rich-text information is transmitted.
If the IMC is set to never send rich-text data, then
          even if the properties of the recipient address have the
rich-text option selected, no rich-text is transmitted. If the
          IMC has separate settings for individual domains, then the
settings for those domains takes precedence for all
          messages addressed to users in those domains. 
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         Alls well that ends well!! www.snyder.on.ca is back
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