Whilst trying (and failing) to find a 6 year old email it dawned on me that I used to meticulously manage my email, moving them into the appropriate folders and deleting old ones but over the last few years my habits have changed. I no longer do this, I read ones that come in but leave them there. I then rely on search to find anything I need. I wish I had done this back 6 years ago and I might still have that email.