To turn off Mail notifications, head to Settings > Notifications > Mail. At the top of this screen find the option labeled Allow Notifications and tap the green toggle switch to turn it off.How do you forward an email on an iPhone?
How to Forward on an iPhone. Tap the "Mail" icon on your iPhone's home screen to open the Mail app. Tap on the email message you'd like to forward to open it. Tap on the left-facing arrow at the bottom of the screen. Select the "Forward" option. This opens a new email composition window and inserts the forwarded message in the body.