from exchangelib import DELEGATE, Account, Credentials

credentials = Credentials(
    username='banco\\jbravo11',
    password='kudaw2017')
account = Account(
    primary_smtp_address='jbravo11@externos.bancoestado.cl',
    credentials=credentials,
    autodiscover=True,
    access_type=DELEGATE)
for item in account.inbox.all().order_by('-datetime_received'):
    print(item.subject, item.body, item.attachments)