IMAP and POP are the incoming mail server protocols that are supported by most of the email services. In this, POP is preferred when the users wish to access their email accounts only on a single email client. But IMAP is the protocol that is usually preferred, as it stores a copy of the email messages on the mail server and allows the users to access them from multiple devices. Yahoo Mail Pro also supports POP and IMAP. You can use the Yahoo Mail Pro IMAP settings that are given below to configure your email account on email clients like Outlook, Mozilla Thunderbird, etc.