春季未发送电子邮件

Question

我想通过Spring Boot发送电子邮件，这是我在aplication.properties中设置此配置的方式：

spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.auth=true
spring.mail.host=xxxxx.hostgator.com
spring.mail.port=465
spring.mail.username=XXX@xxxx.com
spring.mail.password=XXXX
spring.mail.protocol=smtp
spring.mail.default-encoding=UTF-8

但是问题是当我用邮递员对其进行测试时，请求始终处于“正在加载”状态：

当我使用gmail帐户测试功能时，它可以正常工作！ 我的功能：

public void sendPaimentEmail(String to, String subject, String text) {
      MimeMessage message = emailSender.createMimeMessage();
      try {
          MimeMessageHelper helper = new MimeMessageHelper(message, true);
          helper.setTo(to);
          helper.setSubject(subject);
          helper.setText(text, true);
          FileSystemResource imageSignature = new FileSystemResource(new File(this.pathToSaveFile2 + "logo.png"));

          if (null != imageSignature && imageSignature.exists()) {
             helper.addInline("logo", imageSignature);
           }

           FileSystemResource file = new FileSystemResource(new File(this.pathToSaveFile2 + "historique.png"));
         helper.addAttachment("Invoice", file);
          this.emailSender.send(message);

    } catch (Exception e) {
          e.printStackTrace();
    }
}