發送帶附件的郵件，顯示發送成功，但是郵件里和垃圾桶都看不到，不知道怎么處理。

//攜帶郵件附件
public?void?sendAttachmentsMail(String?to,String?subject,String?content,String?filePath)?throws?MessagingException?{
????MimeMessage?message?=?mailSender.createMimeMessage();
????//如果需要帶上附件，請寫true
????MimeMessageHelper?messageHelper?=?new?MimeMessageHelper(message,true);
????messageHelper.setFrom(from);
????messageHelper.setTo(to);
????messageHelper.setText(content,true?);
????messageHelper.setSubject(subject);
????FileSystemResource?fileSystemResource?=?new?FileSystemResource(new?File(filePath));
????String?filename?=?fileSystemResource.getFilename();
????messageHelper.addAttachment(filename,fileSystemResource);
????mailSender.send(message);
}