Having sangham.net as email-provider works actually perfect with the app, no troubles with the need of settings for servers... just use email and password.
Of course Atma/Kana would encourage to seek in the world but to better gain Nissaya by making use of gifts given in faith and for the Buddhaparisa, using possibility to let know the need of an email here.
How ever, if one can not gain a sangham.net email (out of what ever readon), or does not like to relay on given, fearing to lose connection to Samsara and Mara, the apps-givers have made a list of public and commercial email-server-providers:
https://providers.delta.chat giving ways for your choice.
(not wondering...gmail and other main providers, make it not easy to escape their industries)