The Print Preview screen displays whenever a report template is selected. There is not an option to disable the Print Preview.
To attach a report as a file to an email, select the menu File -> Send As
Or select the toolbar option Send As 
If you wish to not print to paper, but attach the document to an email, select this and the file format you wish to send.
Below are screenshots of selecting PDF document, editing the filename of the attachment, and your default email program automatically opening with the file attached with the subject line “From (username)” where (username) is the name logged into the computer as.
