problem sending html email

[eluser]PermanaJ[/eluser]
when i try using the print debugger, there are some message like this

Code:

...
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="B_ALT_4a07ac093fe3f"
This is a multi-part message in MIME format.
Your email application may not support this format.

--B_ALT_4a07ac093fe3f
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit




--B_ALT_4a07ac093fe3f
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Email Test


--B_ALT_4a07ac093fe3f--

what does it mead ? does it mean that the email format still in plain text ... ?