Sort your email printouts in a way that's logical to you and your needs. It may be by sender, by emails related to specific projects or by date sent. Make temporary labels for each pile and stack the printouts within these categories.
Organize the email stacks within each category by date, alphabetical order by sender or other method that works for you.
Make a file folder for each email stack category and clearly label the folder tab with the proper category name.
Arrange the files in alphabetical order and place them into a filing system. Filing cabinets work best for large volumes of paper where plastic file bins or mesh folder trays work for smaller numbers of folders.