Not wanting my e-mail accounts to hog up space. I know I have ~16GB available, but I want to keep my e-mail volume to a minimum on my Pre. Does the "show email" feature under "sync" in the email prefs control the deletion of old e-mail or just what range actively appears on the phone.

Maybe a dumb question on my part, but their decision to call it "SHOW EMAIL" makes me wonder if the other emails are in there and just not being displayed.

(This is set up as a pop3 account).

Can anyone tell me if my phone is actually deleting e-mail older than 7 days or 14 days or wherever I set that preference?