Amazon web services 错误：无法满足该请求

我正在努力向aws elastic beanstalk上托管的服务器发送电子邮件，使用cloudfront提供的证书，我正在使用NodeEmailr发送电子邮件，它在我的本地环境中工作，但部署到aws后失败

电子邮件代码：

const  transporter = nodemailer.createTransport({
  host: 'mail.email.co.za',
  port: 587,
  auth: {
    user: 'example@email.co.za',
    pass: 'email@22'
  },
  secure:false,
  tls: {rejectUnauthorized: false},
  debug:true
});

const mailOptions = {
  from: 'example@email.co.za',
  to: email,
  subject: 'Password Reset OTP' ,
  text: `${OTP}`
}


try {
  const  response  = await transporter.sendMail(mailOptions)

  return {error:false, message:'OTP successfully sent'   , response}
}catch(e) {

  return {error:false, message:'Problems sending OTP, Please try again'}
} 

来自AWS的错误：

const  transporter = nodemailer.createTransport({
  host: 'mail.email.co.za',
  port: 587,
  auth: {
    user: 'example@email.co.za',
    pass: 'email@22'
  },
  secure:false,
  tls: {rejectUnauthorized: false},
  debug:true
});

const mailOptions = {
  from: 'example@email.co.za',
  to: email,
  subject: 'Password Reset OTP' ,
  text: `${OTP}`
}


try {
  const  response  = await transporter.sendMail(mailOptions)

  return {error:false, message:'OTP successfully sent'   , response}
}catch(e) {

  return {error:false, message:'Problems sending OTP, Please try again'}
} 

这项要求未能得到满足

504错误无法满足请求CloudFront尝试 与源建立连接，但 尝试失败或源站关闭了连接

NB：代码在本地计算机上运行良好