I try to go through and regularly delete emails I don't feel to be important. I archive the ones that I do want to keep, but the rest get deleted. I simply don't need to hold on to things like old conversations with my advisors about registration, emails from Facebook, Twitter, etc. containing updates, random emails amongst friends, and many more. I don't consider those to be spam, and some of them were definitely genuine email for the time, regardless of how you define something ambiguous like "genuine email", but I just don't feel the need to be a digital pack rat. There's a decent chance that I'm not the only one that feels this way.
