如何在outlook javamail中包含签名

MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress("sender@example.com"));
message.addRecipient(Message.RecipientType.TO, new InternetAddress("recipient@example.com"));
message.setSubject("邮件主题");

Multipart multipart = new MimeMultipart();

MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("邮件正文内容");

MimeBodyPart signatureBodyPart = new MimeBodyPart();
signatureBodyPart.setText("签名内容");

multipart.addBodyPart(messageBodyPart);
multipart.addBodyPart(signatureBodyPart);

message.setContent(multipart);

Transport.send(message);