Hello,
I intall "two-step verification" and I do not work anymore in the hotmail account outgoing mail. In login to windows (which corresponds to an account WLM) I inserted the password received, while in the second the password is not changed otherwise it does not work for incoming mail.

NB. I have two other accounts, one of Virgilio and the other to Alice and they both work with both incoming and outgoing mail, without changing the password.!