Fix: An email recipient receives a winmail.dat instead of attachments

How to read Winmail.dat attachments

Recipients notify you that the e-mail messages you send to them appear as messages with an attachment called winmail.dat.

Cause

• You are using the Rich Text message format, which the recipient’s e-mail program cannot interpret correctly.

• The recipients email address has become “corrupt” in Outlook’s “auto-complete” list. The Auto-Complete List is a feature which displays suggestions for names and email addresses as you start to type them in the To, Cc, and Bcc boxes. These suggestions are possible matches from a list of names and email addresses from the email messages that you have sent.
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Resolution

STEP #1: Send messages in HTML or plain text format (not rich text)

1. On the Tools menu, click Options, and then click Mail Format.
2. Under Message Format, in the Compose in this message format list, click HTML or Plain Text.
3. Click OK.

STEP #2: Remove an email address from Outlook’s Auto-Complete

Delete a name from the Auto-Complete list

Outlook 2010 “Auto-Complete” list

There might be entries that you want to remove, such as entries that are no longer current or accurate. To remove unwanted names, do the following:

  1. Select the unwanted name or email address by using the UP ARROW or DOWN ARROW key.
  2. Click X or press DELETE.

To remove all names from your Auto-Complete list, do the following:

  1. Click the File tab.
  2. Click Options.
  3. Click Mail.
  4. Under Send messages, click Empty Auto-Complete List.

 

Source Article: https://office.microsoft.com/en-us/outlook-help/delete-a-name-from-the-auto-complete-list-HA010355568.aspx

 

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Christine Otten

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