I'm not nearly the email pack-rat that I used to be. Since I don't use it for business (or very, very little) it's mostly family & friends stuff and 'junk.' But to back up things I do want to keep I have my primary account forward all email to another account (both very trustworthy and reliable services). Once in a while, if I think of it and if it's important enough, I'll fire up Outlook 2007 and get my FM IMAP account to download any new 'keepers.'
When you back things up do you back up only business emails or also family stuff, newsletters, online shopping receipts, etc. ?