<ul><li>Sending emails in Spring Boot can sometimes lead to issues, such as a NullPointerException due to improper dependency injection.</li><li>To fix this issue, make sure to utilize Spring's testing features and allow Spring to manage the lifecycle of your dependencies properly.</li><li>Ensure correct configuration in the application.properties file, including the Gmail address and app password.</li><li>By following the troubleshooting steps, like checking configuration, firewall settings, and recipient email validity, you can successfully send emails in Spring Boot.</li></ul>

How to Send Emails in Spring Boot: Troubleshooting Guide

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