// create request message
MimeMessage message = new MimeMessage(AttachmentUtils.JAVAMAIL_SESSION);
message.setContent(mp);
message.saveChanges();
MimeMessageMockResponseEntity mimeMessageRequestEntity
= new MimeMessageMockResponseEntity(message, isXOP, this);
result.addHeader("Content-Type", mimeMessageRequestEntity.getContentType().getValue());
result.addHeader("MIME-Version", "1.0");
mimeMessageRequestEntity.writeTo(outData);
}
if (outData.size() > 0) {
byte[] data = outData.toByteArray();