In order to prevent virus distribution, at the moment Gmail users cannot attach and send these file types neither directly nor in the archive: .ADE, .ADP, .BAT, .CHM, .CMD, .COM, .CPL, .EXE, .HTA, .INS, .ISP, .JAR, .JSE, .LIB, .LNK, .MDE, .MSC, .MSI, .MSP, .MST, .NSH, .PIF, .SCR, .SCT, .SHB, .SYS, .VB, .VBE, .VBS, .VXD, .WSC, .WSF, .WSH. In two weeks’ time this list will be expanded by .JS file as well. Gmail does not allow sending documents with malicious macros, password-protected archives or archives including previously mentioned files.
Nevertheless, Google is going to protect users from malicious emails; you should still be careful with your inbox. Hackers and crooks have many other ways how to trick users, infect computers and swindle the money. Before opening safe-looking email attachments, clicking on links or providing some personal details, always make sure that you can actually trust the sender. Lack of credentials, grammar or spelling mistakes, and other small details help to recognize malicious emails and protect yourself.