Any serious browser-based email program will block an *.exe file REGARDLESS whether it is compressed inside an archive (i.e. 7z) or not. The point of the IExpress.exe utility is to create a self-installing package but you were probably too busy writing your nonsense so you missed that. I am curious if your comment is…

Did not work on Windows 10 x64, error about a “MakeCAB” something missing. Useless tutorial about yet another useless M$ utility.

What a shill!