How can I create gmails on @harvard.edu, @eesti.ee server ?

How can I create gmails on @harvard.edu, @eesti.ee server ? You have already heard about byteball. I have seen the gmail arrested bot there. they have told me to verify our gmails with their bot but the condition is my gmail has to be in @harvard.edu or @eesti.ee servers. But I don't know anything about these server can anyone tell me something about this?
Thanks in advance!