old_contents: import logging
  import webapp2
  from google.appengine.ext.webapp.mail_handlers import InboundMailHandler
  from google.appengine.api import mail
  
  class ReplyHandler(InboundMailHandler):
      def receive(self, mail_message):
          logging.info("Received a message from: " + mail_message.sender)
          logging.info("Received a message : " + mail_message.bodies('text/plain'))
  
          message = mail.EmailMessage()
          message.sender = "Simple Email GAE <email@email@appspotmail.com>"
          message.to = mail_message.sender
          message.subject = "Reply from GAE"
          message.body = "This is reply message from GAE"
         
          message.send()
          
  
  app = webapp2.WSGIApplication([ReplyHandler.mapping()], debug=True)
  
new_contents: import logging
  import webapp2
  from google.appengine.ext.webapp.mail_handlers import InboundMailHandler
  from google.appengine.api import mail
  
  class ReplyHandler(InboundMailHandler):
      def receive(self, mail_message):
          logging.info("Received a message from: " + mail_message.sender)
  
          message = mail.EmailMessage()
          message.sender = "Simple Email GAE <email@your-app.appspotmail.com>"
          message.to = mail_message.sender
          message.subject = "Reply from GAE"
          message.body = "This is reply message from GAE"
         
          message.send()
          
  
  app = webapp2.WSGIApplication([ReplyHandler.mapping()], debug=True)
  
subject: Fix bug : error at logging