To change the Email settings, open the Email app, tap the Menu icon > Settings.
The General settings menu includes the following options: Set default account, Select download storage, Email preview, Conversation view, Split view, Load linked images, Ask before deleting, Auto-advance, Resize image, VIP settings, and Trusted certificates.
Tap an account in the list to modify the settings that apply only to that account including Account name, Your name, Use signature, Signature, Update schedule, Days to sync email, Message size limit, Download over Wi-Fi, Files size for Wi-Fi Download, Accounts, Always Cc/Bcc me, Security settings, Notifications, Notification sound, Vibrate, Incoming server settings, Outgoing server settings, and Remove account.