Contributed an enhancement to the spring-projects/spring-boot repository by developing a failure analyzer that improves troubleshooting for MailSender configuration errors. Focused on Spring Boot’s auto-configuration, the work introduced clearer diagnostic guidance when the MailSender bean is missing, helping users identify and resolve misconfigurations more efficiently during mail setup. The solution leveraged Java and the Spring Framework, applying the failure-analysis pattern to streamline error reporting and reduce support overhead. Emphasis was placed on reliability and developer experience, with thorough unit testing to ensure robust integration. No bugs were addressed during this period, as efforts centered on feature delivery and maintainability.