Do you keep old e-mail?
brk: I keep some old emails.  I clean up randomly when I have nothing better to do.Other than a few reg emails, most of it is valueless.  Keep many more in my business account, "just in case".I have to admit that I use Mail/Entourage (personal/work) as a hack database in that I will often search for a person's name or product name to find associated info (contact data, etc.).  So that can lead to keeping more email than I probably should.