Java Captain

Sep 16, 2026 · Backend Development

Spring Boot Email Integration: Build Verification Code System with Redis & Thymeleaf

This tutorial walks through email protocols, third-party SMTP setup for Feishu and QQ, Spring Boot mail starter configuration, core JavaMailSender/MimeMessage/MimeMessageHelper relationships, and a complete email verification code implementation using Redis for storage and Thymeleaf for HTML templates.