The guided instructions given below will direct you in add another email to iPhone (iOS 12) device.
Step 1:Switch on your iPhone device.
Step 2:Navigate to the Settings section and tap the Passwords & Accounts option.
Step 3:Locate and tap the Add Account option click the option to add another email to iphone.
Step 4:Now, a list of available email types will be displayed on the screen.
Step 5:Choose your email type from the suggested list.
Step 6:If your email type is not displayed, tap the Other option on the same screen and perform the on-screen instructions.
Step 7:Complete the remaining set of the email configuration by following the on-screen instructions.
Step 8:After adding your email successfully, try to send a test mail to check if the configuration is done correctly.
Step 9:Locate and click the Call button available on this web site to get remote assistance on the same if you don't know how to add another email to iphone.