I use gmail accounts so all my mail gets sent there first. Then I use POP3 to retrieve new messages as they arrive. I save the important downloaded messages i

I use gmail accounts so all my mail gets sent there first. Then I use POP3 to retrieve new messages as they arrive. I save the important downloaded messages in kmail on my desktop computer and I delete the rest locally. If I ever accidentally delete an important email locally I just login to the gmail web interface and retrieve a new copy. It's a good system because it archives all my email on the gmail server first, saves copies of the important messages locally, and eliminates more than 99% of my SPAM so I never have to deal with it.