I know for sure it does not work for Microsoft (Something about Smtp authentication not being enabled, cannot be fixed for people using a personal account). Google also does not work, due to a different reason: They do not support sending and receiving mail via Device Authorization Flow (which is used here). (Google is not that important though as a user could also use an App Password) I am not sure about other providers. This bug is only here so anyone who is willing to do so can solve it.
I know for sure it does not work for Microsoft (Something about Smtp authentication not being enabled, cannot be fixed for people using a personal account). Google also does not work, due to a different reason: They do not support sending and receiving mail via Device Authorization Flow (which is used here). (Google is not that important though as a user could also use an App Password) I am not sure about other providers. This bug is only here so anyone who is willing to do so can solve it.