As a security measure to prevent potential viruses, Gmail doesn't allow you to send or receive files with following extensions :
"ade", "adp", "bat", "chm", "cmd", "com", "cpl", "exe",
"hta", "ins", "isp", "jse", "lib", "mde", "msc", "msp",
"mst", "pif", "scr", "sct", "shb", "sys", "vb", "vbe",
"vbs", "vxd", "wsc", "wsf", "wsh"
If you try to attach a file with these extensions, it will give you an error like this "This is an executable file. For security reasons, Gmail does not allow you to send this type of file."
Worse, Gmail won't accept these types of files even if they are sent in a zipped (.zip, .tar, .tgz, .taz, .z, .gz, .rar) fo