You can change a contacts email address by following the below steps.
Navigate from the home menu to Contacts.
Go to Change A Contact's Address.
Enter a contact's current email address.
Then enter the new address.
Select a list option:
Current List: The list you're actively working on.
6. Click Change Address.
NOTE: Ensure the contact that you're updating is not already subscribed to your list.
You've successfully updated a contacts email address!