Not able to send .exe files in Gmail. Try this Trick!
For security Gmail does not allow you to send files with .exe extension. But if you are sure your exe file is free of viruses and you want to send it then just change the file extension from .exe to .ex
This way gmail will not recognize it as an executable file and will allow you to send it.
Make sure the person you are sending this file changes the back the extension to .exe before launching it.