• How to open WinMail .DAT file on email attachment

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    This keeps occurring…
    You may receive an email with file attachment that is a
    .DAT file, or name such as xxx.WinMail.DAT.
    How to open it?
    Worse, sometimes, the attachment actually embeds 2 or more files in it.

    WinMail.DAT attachment is from Outlook, Outlook Express, or MS Exchange email clients.

    How to:
    1. Download the email attachment to your PC.
    2. Use WinMail Opener to ‘unpack’ it into individual file(s).

    Google WinMail Opener and download the file. No need to install. Just double click the EXE file to run it.

    Once running, click the ‘Open’ button. Select the downloaded attachment. WinMail Opener will show you the file(s) embedded in the attachment. Select the file you want to ‘unpack’. Save it to the folder of choice. Repeat and save other files if needed.
    Hope this helps.

    Viewing 3 reply threads
    • #1437134

      I can find the Android and Apple versions, have you located a Windows version?

      cheers, Paul

    • #1437166


      See Winmail Opener[/url].



    • #1437505

      Winmail.dat attachments are often the result of an originator sending an html or rtf formatted email when the local email client is configured to receive plain text.

      Rather than try decode the winmail.dat with a 3rd party tool, try get the originator to send in plain text, or change the email client to receive rtf or html email messages.

    • #1437895

      In my cases, it involves business environment/transactions, not our daily consumer situation.
      There maybe difficulty (physical and/or mental) to request sender to resend in a different format/method.
      Per my client, “Request to fax the document is embarrassing.”

      • #1440005

        Many times I have found that files with the .dat extension are not really winmail documents. If you save the file then rename it to .doc then it can be opened with word. It is much easier to do this if you are NOT hiding extensions of known file types.

    Viewing 3 reply threads
    Reply To: How to open WinMail .DAT file on email attachment

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