You can further reduce the drain on the battery and reduce e-mail overload by limiting the amount of e-mail you download to your iPhone. Immediately below the Auto-Check setting on the Home >Settings >Mail screen is the Show setting. You can set this to display a specific number of the most recent messages: as low as 25 and as many as 200. If you want to see additional messages, tap on the Download More button in the Mail program.
By Anonymous (not verified)
Updated 05/27/2021