Problems setting email headers with javax.mail.*

Question

I'm trying desperatly to send HTML emails with javax.mail but I simply can't. No matter what I do, no matter how and where I set the headers it always come out as text.
Here's a sample code:
try {
          Properties props = System.getProperties();
          props.put("mail.smtp.host", "smtp.ability.com.br");
          Session session = Session.getDefaultInstance(props, null);
          Message msg = new MimeMessage(session);
          msg.setHeader("Content-Type", "text/html");
          msg.setRecipient( MimeMessage.RecipientType.TO, new InternetAddress("[email protected]") );
          msg.setFrom( new InternetAddress("[email protected]") );
          msg.setSubject("teste");
          msg.setText("<b>testeeeeeeeeeeeee</b>");
          Transport.send( msg );
          } catch( Throwable t ) {
               System.err.println(t);
          }and here's the resulting email:
Return-Path: <[email protected]>
Delivered-To: [email protected]
Received: (qmail 5895 invoked by uid 510); 21 Dec 2004 16:41:49 -0000
Received: from [email protected] by relay03.dominal.com
Received: from unknown (HELO christian) (200.217.110.124)
  by 0 with SMTP; 21 Dec 2004 16:41:48 -0000
Message-ID: <20590970.1103647309922.JavaMail.christian@christian>
From: [email protected]
To: [email protected]
Subject: teste
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
<b>testeeeeeeeeeeeee</b>What am I missing here?
Thanks in advance,
Christian

Answer 1

msg.setText("<b>testeeeeeeeeeeeee</b>");R
eplace that
bymsg.setContent("<b>testeeeeeeeeeeeee</b>",
"text/html");
Thanks DrClap, but that's not exactly the solution I'm looking for, cuz I would have to hard-code that header.
I have an Email class that I use as a wrapper for the javax.mail API, and I wanna be able to have a setHeader() method that works to enable the users to set the content-type of the text (or HTML) portion of the email, even when there are attachments. How can I achieve this?