[TYPO3] DirectMail strip the CSS

[Rocky Ou]

Hey list,

I'm using the direct_mail to send out the newsletter. I compiled the
direct mail by creating a page which render the content of a normal 
page. When the mail client get the newsletter, the CSS files are striped 
off. You can look at the normal page at 
http://www.maxsource.net/~lacasade/index.php?id=106. And attached is a 
scrrenshot of the newsletter in my gmail.

Can any of you tell me how can I make the newsletter has the same 
presence with the web page please?

Thanks a lot in advance!
Rocky