You dont go to mail calendar or contacts. Open the Settings app on your iPhone or iPad. Configure Mail App On Ios Mobile Device Iphone Ipad Hostway Help Center You also want to change it in the outgoing mail server settings by tapping on SMTPPrimary ServerPassword. How to change password on iphone 7 mail account . Tap Next and wait for Mail to verify your account. Its not the old school way. Enter your iPhones passcode or verify your identity with Face or Touch ID. SettingsPasswords and AccountsYour E-Mail account nameAccountPassword. Go to Settings Passwords Accounts Choose your email account Re-enter Password Scroll to the bottom of your Mail App and look for a message indicating theres an Account Error. At this point if youve forgotten your Gmail password. Scroll down then tap Passwords. Click the File menu in the top left-hand corner of the screen select Options and then Email accounts. To change your password for your email if you change it on a desktop.