There's a charge in Ontario called "Uttering a death threat" (I know this because my brother was charged years ago when sister in law's ex starting messing with the family). It is a crime to threaten someone in Ontario.
Not only should you print out the email but also the detailed properties/return path:
*Click on "File" at the top of the email
*Scroll down & click on "properties"
*Click on the "details" tab
*highlight & copy the return-path info all the way to the bottom, paste into a word doctor and print out.
***Save that original email & return path info until told by both the police & ISP provider that it is no longer needed as evidence***
