Hi,
There is a Email Module With Templates app store module can download and use,
Find few answered questions as well , its always a good practice to search in the forum for solution before raising new question.
https://docs.mendix.com/appstore/modules/email-with-templates
https://forum.mendix.com/link/questions/89106
https://forum.mendix.com/link/questions/18532
Hope this helps!
Or do it without having to set it up by using EmailService which is free of charge if you don’t send thousands of mail per month. See https://marketplace.mendix.com/link/component/117760