Yahoo mail has virtually no support. Support requests ALWAYS go unanswered. When logging into mail, some kind of confirmation is constantly required, although two-factor identification is disabled in the settings. This in turn results in mail sometimes becoming unavailable at all, and if you use it for business, your business could be seriously affected. The decision about the degree of confidentiality rests with the user, not Yahoo management. However, despite this, your mail may be blocked for you if somewhere the Yahoo management did not like something. Such actions are a gross interference in the private and business life of the user, forcing him to have a countless number of ways, not always available, to confirm his identity. I do not recommend using this email, and I was forced to configure the forwarding of all messages to Gmail. Now I am forced to inform all my counterparties of the new email address.