Email is best secure way to communicate and transfer files between friends but due to security reasons many email clients software and free email provider blocked sending software between two email , even you can not draft software online on your email draft folder.
Only one reason is here , hackers were sending malicious files to victim for hack information.but i have a little trick by using this ,you can send any types of files to other email.
If you will send software file then this type of error will show.
First of all you have to do one thing in your windows operating system.
Go to my computer, then click on ‘Organize’ in top left corner then click on “Folder and search option” now a window will appear.
Now click on “Hide extensions from known file types” and click on OK button.
After showing extension rename software file from .exe to .PNG and now see this.
Now after changing .exe to .png you are ready to send email attachment.