OL98: (IMO) Winmail.dat Attachments Included in Received Messages

ID: Q193117

The information in this article applies to:


NOTE: These procedures only apply if you have installed Outlook with the Internet Mail Only option. To determine your installation type, on the Help menu click About Microsoft Outlook. In About Microsoft Outlook you should see "Internet Mail Only" if you have the Internet Mail Only option installed.

SYMPTOMS

When you use Microsoft Outlook 98 to send e-mail through the Internet, some recipients using e-mail clients other than Outlook, report that the mail message includes an additional file called Winmail.dat. The file is usually very small, but cannot be opened in the mail message.


CAUSE

The Winmail.dat file is used to preserve formatting that the sending client includes in the message, but is not recognized by the receiving client. In the case of Outlook, the Winmail.dat file includes Rich Text Formatting (RTF) instructions.


RESOLUTION

To avoid including Winmail.dat, use the Plain Text mail format. To select Plain Text for all messages, follow these steps:

  1. On the Tools menu, click Options and then Mail Format.


  2. In "Send in this message format", click to select Plain Text.


If you would like to send RTF format to certain recipients and send others Plain Text, you have two options:


REFERENCES

For more information on RTF message formats, please see the following articles in the Microsoft Knowledge Base:

Q185894 OL98: Attachments Not Visible to Some Recipients When Using TNEF
For more information on Winmail.dat attachments, please see the following articles in the Microsoft Knowledge Base:
Q149203 XFOR: Preventing Winmail.dat From Being Sent Over IMC

Q138053 XFOR: Preventing WINMAIL.DAT Sent to Internet Users

Additional query words: 98 


Keywords          : kb3rdparty kbdta CfgIM Intp3rdPty 
Version           : WINDOWS:
Platform          : WINDOWS 
Issue type        : kbprb

Last Reviewed: July 29, 1999