Hi there,
When I was doing all the evidence bit, I filed all my emails in a seperate folder for emails from my husband, and did a print (i.e. screenshot) of the contents of that folder, the page with all the details of email address, title and date. It showed they were all from my hubby on a pretty much daily basis.
Apart from the waste of paper and ink, and the fact that they're probably not going to read every email, I don't think I'd want to submit actual emails anyway - for sure some of mine are very personal and were only ever intended for my husband's eyes!
Good luck,
Nyree