hao li

As early as the end of January, most people in China will wear masks when they go outside. Wearing masks effectively reduces the spread of the virus. I hope people in other parts of the world will wear masks when they go outside to protect themselves and others.

This is a good idea, but i have a question, for the mail recipient, there are often all kinks of problems, such as mail delay, mail is thrown into trash box, mail is rejected and other risks, how to ensure that users can access the system?