old_contents: # the smtp server of the mail service you are using
  smtp_addr = "smtp.ym.163.com"
  
  # email address used to send the warning email
  account   = "xxx@xxxx.com"
  
  # password of the account above
  password  = "xxxx"
  
  # the email receving the warning email
  # it can be same with the sending email
  send_to   = "xxx@xxx.comm"
  
  # currency you want to use
  currency  = "CHN"
  
  # if the price is higher than "high" or less than "low"
  # it will warn
  high      = 4200
  low       = 4000
  
new_contents: # the smtp server of the mail service you are using
  smtp_addr = "smtp.ym.163.com"
  
  # email address used to send the warning email
  account   = "xxx@xxxx.com"
  
  # password of the account above
  password  = "xxxx"
  
  # the email receving the warning email
  # it can be same with the sending email
  send_to   = "xxx@xxx.comm"
  
  # currency you want to use
  # Options options can be found at https://blockchain.info/ticker
  currency  = "CHN"
  
  # if the price is higher than "high" or less than "low"
  # it will warn
  high      = 4200
  low       = 4000
  
subject: Update comment in config file