15 May 2017
Gmail Blocks JavaScript Attachments
.js has been added to the list of file type that are blocked by Gmail for security reason.
You’ll find the full list of blocked file types here: full list
Tips:
1) Change the file extension if you still want to send JavaScript.
2) Unfortunately it’s not so easy if you receive a JavaScript file from someone else. You need to use a native email client like Apple Mail. Gmail disables the download and the “Save to Drive” button.