tjames7000

  const net = require('net')
  
  const server = net.createServer((socket) => {
   socket.setEncoding('utf8')
   socket.write('220 ...')
  
   socket.on('data', (data) => {
    if (isHideMyEmail(data)) {
     // handle one way
    } else {
     // handle another way
    }
   })
  
   ...
  })
  
  server.listen(25, '0.0.0.0', () => {
   console.log(`Ready for incoming emails`)
  });

  "delivery-status": {
   "code": 550,
   "description": "This is a system-generated message to inform you that your email could not\r\nbe delivered to one or more recipients. Details of the email and the error are as follows:\r\n\r\n\r\n<[email protected]>: host 127.0.0.1[127.0.0.1] said: 550 5.7.1 message\r\n    content rejected due to spam; if you feel that your email was rejected in\r\n    error, please forward a copy to [email protected] (in reply to end of\r\n    DATA command)\r\n",
   "enhanced-code": "5.7.1",
   "message": "smtp; 550  message content rejected due to spam; if you feel that your email was rejected in error, please forward a copy to [email protected]"
  }