Problem receiving HTML-mail in Entourage X

Hi folks,
I have trouble receiving HTML-mail.

I create it in Outlook 2002 on a PC (it looks fine and dandy). Then I send it to the Mac (Running OS X Panther 10.3.5 and Office X 10.1.5). When I open the mail in Entourage it looks just like plain text. The content type in the internet header is text/plain.

If I forward the mail to another PC running Outlook, it opens and displays the mail as HTML.

Any help appreciated!

 

Under 'Read' in Mail & News Preferences, I have enabled "Display complex HTML in messages" and "Allow network access when displaying complex HTML". Other than those two, I can't find any options for turning on / off HTML in mails.

Also, I've tried to create a HTML mail in Entourage, and send it to the PC running Outlook 2002. No problem displaying the mail as HTML. Also, here's that header:

Code:

Message-ID: <BD817E2B.D7%stefan.falk@mytravel.se>
Mime-version: 1.0
Content-type: multipart/alternative; boundary="B_3179380267_4799150"

> This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.

--B_3179380267_4799150
Content-type: text/plain; charset="ISO-8859-1"
Content-transfer-encoding: quoted-printable

--B_3179380267_4799150
Content-type: text/html; charset="ISO-8859-1"
Content-transfer-encoding: quoted-printable

--B_3179380267_4799150--