Java 亚马逊SES自定义标题列表取消订阅isn'；行不通

我试图在我发送的电子邮件中添加“列表取消订阅”标题（通过亚马逊ses），但当我看到收到的电子邮件时，没有这样的标题。我需要它来减少垃圾邮件投诉的数量，提高交付能力和声誉

SendEmailRequest sendEmailRequest = new SendEmailRequest();
sendEmailRequest.putCustomRequestHeader(UNSUBSCRIBE_HEADER, unsuscribeURL);

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PS：使用其他提供商，如Mandrill或Sendgrid，它可以工作，但我在amazon上确实需要它，所以。。。我找到了一个解决办法。 如果要向邮件添加自定义标题，请始终使用原始邮件，而不是简单的邮件

大概是这样的：

    SendRawEmailRequest sendRawEmailRequest = new SendRawEmailRequest();
    RawMessage rawMessage = null;
    rawMessage = buildSimpleRawMessage(...);
    sendRawEmailRequest.setRawMessage(rawMessage);


private RawMessage buildSimpleRawMessage(String subject, String message, Attachment attachment) {
    RawMessage rawMessage = null;
    try {
        // JavaMail representation of the message
        Session s = Session.getInstance(new Properties(), null);
        MimeMessage mimeMessage = new MimeMessage(s);

        // Subject
        mimeMessage.setSubject(subject);

        // Add a MIME part to the message
        MimeMultipart mimeBodyPart = new MimeMultipart();
        BodyPart part = new MimeBodyPart();
        part.setContent(message, "text/html");
        mimeBodyPart.addBodyPart(part);

        // Add a attachement to the message
        if(attachment!=null){
            part = new MimeBodyPart();
            DataSource source = null;
            source = new ByteArrayDataSource(attachment.getBuf(), attachment.getMimeType());
            part.setDataHandler(new DataHandler(source));
            part.setFileName(attachment.getFileName());
            mimeBodyPart.addBodyPart(part);
        }

        mimeMessage.setContent(mimeBodyPart);
        mimeMessage.addHeader(UNSUBSCRIBE_HEADER, unsubscribeURL);

        // Create Raw message
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        mimeMessage.writeTo(outputStream);
        rawMessage = new RawMessage(ByteBuffer.wrap(outputStream.toByteArray()));
    } catch (Exception e) {
        logger.error("There was a problem creating mail attachment", e);
        throw Throwables.propagate(e);
    }
    return rawMessage;
}