I use Google’s free mail service. And each account gets the privilege of having over 6 gigabytes of storage, if needed.
However, I don’t use anywhere near that much.
I go through my old email about once a month and delete stuff I no longer need. For example, I’m on the TriLUG mailing list. But most of what’s on there has no bearing beyond a few months. So, every month I go through all my old email, and purge what’s more than a year old, unless I’ve specifically tagged it to hold onto longer.
Storage has gotten cheap, but it seems that no one has stopped to ask the question, “should I save it?”, they’ve merely answered the question, “can I save it?”