Mailinglist Archive: opensuse (878 mails)

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[opensuse] Re: Thunderbird 38.1.0 don’t show Outlook *proprietary format* email if "HTML original" is selected
Marco Calistri wrote:
^^^^^^ That's your problem. (from

The MS support sites that describe the format were closed off to me. The
following stles
were inserted at the top of the page -- to force all content NOT to
(example page: @ )
had same result on other MS pages).

<style type="text/css">
.ng-hide .error-content {
display: none;
text-align: center;
font-family: 'Segoe UI';
padding-bottom: 12px;
.error-content h2 {
margin-top: 8px;
margin-bottom: 24px;
color: black;

Outlook can use a method called Transport Neutral Encapsulation Format (TNEF)
to package information for sending messages. The use of TNEF is affected by
settings in Outlook that are referred to as Rich Text Format (RTF).

A TNEF-encoded message contains a plain text version of the message and a
bundled binary attachment that contains the other parts of the original
message. This attachment is named Winmail.dat, and includes:

The formatted text version of the message (including fonts or colors)
OLE objects (embedded pictures and embedded Office documents)
Special Outlook features (custom forms and meeting requests)
Any file attachments that were attached to the original message

Unfortunately, the Winmail.dat bundled attachment is not readable by many other
email clients or by Outllook for Macintosh and it may even appear to the
recipient as though the expected attachment is missing.

Only fix is from those using outlook:

How to Avoid Sending Winmail.dat Attachments
Setting Global Properties

Set the Global Properties to have Outlook by default send your email in
Hypertext Markup Language (HTML):

Outlook 2007: Select Tools > Options > Email Format > Internet Options.
Select Convert to HTML format.
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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