You will need to have a connection to some sort of email program. Mendix doesn't have its own mail service (anymore). An alternative to the email connector could be the GraphAPI that connects to your Office365 environment.
MarketPlace content: https://marketplace.mendix.com/link/component/209559 or https://marketplace.mendix.com/link/component/117007
For more information on the API in general: https://learn.microsoft.com/en-us/graph/overview
Another alternative would be to use an event broker (https://marketplace.mendix.com/link/component/202649) to forward information to an email service.