This video shows how to send email using spring boot application.properties use this spring.mail.host=smtp.gmail.com spring.mail.port=587 spring.mail.username=your email spring.mail.password=password

Mail Authentication and StartTLS Configuration

spring.mail.properties.mail.smtp.auth=true spring.mail.properties.mail.smtp.starttls.enable=true ... https://www.youtube.com/watch?v=kyf_irzTK_o