Many people have probably received not only spam emails, but also emails with various malicious attachments. Often the threat came from files with the permission .bat or .exe, which many email services are no longer capable of sending. In the near future Google will prohibit sending JavaScript files as well.The corresponding ban will take effect on February 13, 2017. In this case, it will be impossible to send not only files with the extension .js by themselves, but also archives with other files, among which will be found the "offender". These measures are taken in order to protect users from accidentally launching JS files, which can be used by intruders to run various executable files. The developers also note that if you need to send a .js file, you can still use various cloud services, including Google Drive.