The information in this article applies to:
- Microsoft Exchange Server, version 4.0
- Microsoft Exchange Windows 3.x client, version 4.0
- Microsoft Exchange Windows NT client, version 4.0
- Microsoft Exchange Windows 95 client, version 4.0
- Microsoft Outlook Windows NT client, version 8.00
- Microsoft Outlook Windows NT client, version 8.01
- Microsoft Outlook Windows 95 client, version 8.00
- Microsoft Outlook Windows 95 client, version 8.01
SUMMARY
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:
- 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.
- 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.
- 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.
- 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@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@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.
|