Java EE (Java Enterprise Edition) General Discussion

Hi everyone!

I have a serious problem concerning message encoding on different machines. On my development machine (running WinXP) I can send email messages perfectly with this code:

MimeMessagePreparator pwMessagePreparator = new MimeMessagePreparator() {
    public void prepare(MimeMessage mimeMessage) throws MessagingException {
    mimeMessage.setHeader("Content-Transfer-Encoding", "8bit");
    MimeMessageHelper message = new MimeMessageHelper(mimeMessage, false, "ISO-8859-1");
    message.setSubject("Engineering-Days - Neues Passwort");
    message.setTo(address);
    String messageText = "Hallo!\n\n" + 
	    			
        "Dein Passwort wurde neu gesetzt. Es lautet jetzt: " + newPw + "\n" +
        "Logge Dich damit bitte auf der Homepage ein und �ndere unter \"Mein Konto\" das Passwort.\n\n" +  
    try {
        message.setText(new String(messageText.getBytes("ISO-8859-1")));
    } catch (UnsupportedEncodingException ex) {
        logger.error(ex);
    }
}};
  
        try {
            mailSender.send(pwMessagePreparator);
        } catch (MailException e) {
            logger.warn("Senden der Mail f�r User " + address + " nicht erfolgreich: " + e.getMessage());
        }

The text is German, never mind its meaning, what counts is that there are umlauts in it. The message is displayed correctly, the header is also correct:

Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit

I set mail.smtp.allow8bitmime to true.

As soon as I deploy the code on my production machine, the header looks like this:

Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

No matter what I do, it is always set to 7bit. Therefore, the umlauts are not transmitted correctly. I also tried lots of different things, including setting the charset to different values, using MimeUtility and so on. Nothing worked.

Any suggestions are highly appreciated.

Best regards,
Jan-Philipp Stegh�fer