diff --git a/rhj/backend/.env.example b/rhj/backend/.env.example
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+# 数据库配置
+SQLURL=mysql+pymysql://username:password@localhost:3306/redbook
+SQLPORT=3306
+SQLNAME=redbook
+SQLUSER=root
+SQLPWD=123456
+
+# JWT密钥
+JWT_SECRET_KEY=your-jwt-secret-key-here
+
+# Flask密钥
+SECRET_KEY=your-flask-secret-key-here
+
+# 邮件服务配置
+# QQ邮箱示例配置
+MAIL_SERVER=smtp.qq.com
+MAIL_PORT=587
+MAIL_USE_TLS=true
+MAIL_USERNAME=1650349938@qq.com
+MAIL_PASSWORD=
+MAIL_DEFAULT_SENDER=1650349938@qq.com
+
+# Gmail示例配置
+# MAIL_SERVER=smtp.gmail.com
+# MAIL_PORT=587
+# MAIL_USE_TLS=true
+# MAIL_USERNAME=your_email@gmail.com
+# MAIL_PASSWORD=your_app_password
+# MAIL_DEFAULT_SENDER=your_email@gmail.com
+
+# 163邮箱示例配置
+# MAIL_SERVER=smtp.163.com
+# MAIL_PORT=25
+# MAIL_USE_TLS=false
+# MAIL_USERNAME=your_email@163.com
+# MAIL_PASSWORD=your_email_password
+# MAIL_DEFAULT_SENDER=your_email@163.com