I am talking about online mailboxes such as Gmail. And I have more than two, because all the most important accounts that I use every day and where funds can be stored are registered to the main one, which is my very first mailbox. On the second profile, I register accounts on sites where you can make money, as well as on sites where the possibility of data theft is not so high. And the third mail is for sites that I doubt, so if they steal data from this box, I won't be sorry, because there's nothing important there.