When you start a search it should search the server as well, it doesn't just search the emails it has stored locally. I have over 15 GB's of email and the iPhon

When you start a search it should search the server as well, it doesn't just search the emails it has stored locally. I have over 15 GB's of email and the iPhone uses server side searching and finds emails back to 2002 with ease. And I am pretty damn sure those are not local on the device.