22+ How To Change Mail Password On Iphone Background. If you have multiple email accounts setup for use in mail app then changing the sent from email address to the one you just updated the password for is recommended (note that does not change the default email address used on the device, it's only for sending that specific email). Scroll down to the security information section and click edit security information.
At the top, tap personal info.
Luckily, the iphone still allows you to have a passcode for your voicemail, on top of the password you set to open your device. Tap google or gmail in your lists of sites.; But it's impossible to change password for accounts in mail app. Then you'll have a screen with your username and password.