You can use the Mail app on your iPhone with other email accounts from popular providers including Microsoft, Gmail, and Yahoo. This makes it easy to manage all of your email in one place.
Una vez que hayas conectado una cuenta, puedes elegir qué información compartir con tu iPhone en Ajustes > Correo > Cuentas > [proveedor de correo electrónico].
You are not restricted to using Apple’s Mail app. Many other email providers, like Gmail, have an app you can download from the App Store.