When it comes to emails, I have to admit...I'm a pack rat. I have a folder for my "sent" emails, a folder for my "deleted" emails and a folder for those I'm not quite sure what to do with "wth". They're all stored at GoDaddy...a pretty decent place with a very unfortunate name and more unfortunate advertising system. However, that's a different subject. I didn't make the choice, but again, that pack rat mentality also hates the thought of learning a new system.
Back to the subject, though...My point is that if you do a lot of business by email, and we all do, you should absolutely take advantage of your storage and save, save, save! It may not be admissable in a court of law, and it may...but in the end you'll know if you received something, sent something, or forgot to do either!
I love being able to search my email folders for the name of a broker, agent or client and come up with everything I received and everything I sent to them. Dates, times, all that stuff is right at my fingertips.
If your email system doesn't have enough storage...invest in it. There's a lot of crap in my storage, too. But, I can weed that out when I have time. I'm not pushed by how full the box is. And, it saves printing the things out and saving them that way. (that's the good feng shui part)
But the best part is that it's so good to be able to say, "This is the last thing I received from you or your company, and this is the last thing I sent."
It's one less thing to worry about...and that's priceless.