Google Mail (Gmail)
Thousands of schools, colleges, universities, companies, and non-profit organizations have adopted Gmail. Included among these adoptions is the University of Delaware, whose Google domain is at googleapps.udel.edu.
A decade ago, setting up institutional email services required so much technical expertise that you would not even think about attempting on your own what is so easily accomplished with G Suite today.
To find out how easy G Suite makes it to set up your own email services, follow this link to the Google Apps Email tutorial.
If you have not yet learned how to get your G Suite domain, follow this link to the G Suite Overview.