WordPress is capable of sending various notification emails, such as password resets or new user registrations, and comments on blog posts. These emails help users and administrators stay informed about important events and actions taken on their websites. By default, WordPress uses the server where it is running to handle these emails, assuming the server can accept and relay them. This means that, assuming the server is properly configured to accept and relay emails, WordPress will utilize the server's built-in mailing functionality to send out notifications. This is typically done through the PHP mail() function or the Simple Mail Transfer Protocol (SMTP). However, users can also configure it to use third-party email services for improved reliability and functionality. Our The ultimate guide to setting up email on WordPress helps walk you through this process.