This issue I faced while using outlook client to send mails from my mail address. Whenever I am sending mails through outlook express, it automatically attach the file name winlail.dat with the attachment. My receipts oftenly said that they were unable to open the attachment, then I have to told them every time that I haven’t attached any attachment with the mail. It automatically attached by default.Now I found the solution that I think to share with ehowportal readers so that they can also do the same and prevent their outlook sending winmail.dat file in attachment to all outgoing mails from Outlook.

How to Prevent the Winmail.dat File from Being Sent From Outlook Client

Why outlook attach winmail.dat file automatically with all outgoing mails:

The reason behind the automatic winmail.dat file attachment is when you try to send e-mail from an Outlook client, a file attachment called Winmail.dat may be automatically added to the end of the message if the recipient’s e-mail client cannot receive messages in Rich Text Format (RTF). This problem occurs because the Winmail.dat file is used to preserve formatting that the sending e-mail client includes in the message, but the receiving client does not recognize the Winmail.dat file. In Outlook, the Winmail.dat file includes Rich Text Formatting (RTF) instructions. This type of formatting is used with the Microsoft Outlook Rich Text format and when you use Microsoft Word as your e-mail editor.

See also : How To Avoid Sending Winmail.dat Attachments From Outlook

Configuring Outlook for not sending Winmail.dat Attachments For Outgoing mails:

Method 1: Change the default message format

  • Go to tools menu > Option > mail format.
  • In Compose in this message format, click to select Plain Text, and then click OK.

Method 2: Modify the recipient’s entry in the Personal Address Book

  • Go to Tools menu > Address Book > Show Names From > Personal Address Book
  • Select the addressee that you want to set as plain text, and then click Properties on the File menu.
  • In the SMTP-General tab, click to clear the Always send to this recipient in Microsoft Exchange rich text format check box, and then click OK.

Method 3: Set the Outlook Rich Text Format Internet e-mail setting

  • If you are using Outlook 2003 and Outlook 2007, go to Options on the Tools menu.
  • Go to mail format tab > Internet format.
  • Under Outlook Rich Text options, click either Convert to HTML format or Convert to Plain Text format.
  • For Outlook 2010 and 2013: Select File > Options > Mail and then scroll to the bottom of the dialog. Select Convert to HTML format.

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