POP Peeper software (version 5.4.6) is a reliable email notification tool compatible with multiple platforms such as Outlook, Gmail, Yahoo, and MSN. Its key feature is instant desktop notification when a new email is received across any of the linked accounts. The software also offers advanced privacy protection, minimising the threats from harmful spams and phishing attempts. Additionally, it also features customizable settings such as highlighting emails from selected contacts and the ability to send emails directly from the software itself.