text: #!/usr/bin/env python
  import argparse
  import sys
  from secure_smtpd import ProxyServer
  from secure_smtpd import store_credentials
  import config
  
  def run(cmdargs):
      args = [
          (cmdargs.localhost, cmdargs.localport),
          (cmdargs.remotehost, cmdargs.remoteport)
      ]
      kwargs = {}
  
      if cmdargs.sslboth:
          kwargs['ssl'] = True
          if not cmdargs.certfile or not cmdargs.keyfile:
              print ('You need to specify a valid certificate file and a key file!')
              sys.exit(1)
          kwargs['certfile'] = cmdargs.certfile
          kwargs['keyfile'] = cmdargs.keyfile
      elif cmdargs.sslout:
          kwargs['ssl_out_only'] = True
  
      if not cmdargs.quiet:
          kwargs['debug'] = True
  
      if cmdargs.username and cmdargs.password:
          credentials = store_credentials.StoreCredentials()
          credentials.username = cmdargs.username
          credentials.password = cmdargs.password
          credentials.stored = True
      else:
          credentials = store_credentials.StoreCredentials()
          credentials.username = config.username
          credentials.password = config.password
          credentials.stored = True
      kwargs['credential_validator'] = credentials
  
      server = ProxyServer(*args, **kwargs)
      server.run()
  
  parser = argparse.ArgumentParser(description='mail relay tool')
  
  parser.add_argument(
      '--localhost',
      default='127.0.0.1',
      help='Local address to attach to for receiving mail.  Defaults to 127.0.0.1'
  )
  
  parser.add_argument(
      '--localport',
      default=1025,
      type=int,
      help='Local port to attach to for receiving mail.  Defaults to 1025'
  )
  
  parser.add_argument(
      '--remotehost',
      required=True,
      help='Address of the remote server for connection.'
  )
  
  parser.add_argument(
      '--remoteport',
      default=25,
      type=int,
      help='Port of the remote server for connection.  Defaults to 25'
  )
  
  parser.add_argument(
      '--quiet',
      action='store_true',
      help='Use this to turn off the message printing'
  )
  
  group = parser.add_mutually_exclusive_group()
  
  group.add_argument(
      '--sslboth',
      action='store_true',
      help='Use this parameter if both the inbound and outbound connections should use SSL'
  )
  
  group.add_argument(
      '--sslout',
      action='store_true',
      help='Use this parameter if inbound connection is plain but the outbound connection uses SSL'
  )
  
  parser.add_argument(
      '--certfile',
      help='Certificate file to use for inbound SSL connections'
  )
  
  parser.add_argument(
      '--keyfile',
      help='Key file to use for inbound SSL connections'
  )
  
  parser.add_argument(
      '--username',
      help='Username for remote authentication'
  )
  
  parser.add_argument(
      '--password',
      help='Password for remote authentication'
  )
  
  args = parser.parse_args()
  
  print('Starting ProxyServer')
  print('local: %s:%s' % (args.localhost, args.localport))
  print('remote: %s:%s' % (args.remotehost, args.remoteport))
  print('sslboth: ', args.sslboth)
  print('sslout: ', args.sslout)
  print
  run(args)
  