Account security email is a feature in Infinite Campus, a popular student information system used by schools and districts. This feature allows users to set up an additional email address for the purpose of account recovery and password resets. By providing a separate email address for account security, users can ensure that they have a backup method to regain access to their Infinite Campus account in case they forget their login credentials or if their primary email address becomes inaccessible. This adds an extra layer of security and helps prevent unauthorized access to student data and other sensitive information stored in the system.