# 配置错误：必须设置 EMAIL_BACKEND

- **ID:** `python/django-email-configuration-error`
- **领域:** python
- **类别:** config_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

设置中未配置电子邮件后端。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 3.x | active | — | — |

## 解决方案

1. **** (95% 成功率)
   ```
   Set EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend' for development.
   ```
2. **** (90% 成功率)
   ```
   For production: EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend' with EMAIL_HOST, EMAIL_PORT, EMAIL_HOST_USER, EMAIL_HOST_PASSWORD.
   ```

## 无效尝试

- **** — Setting EMAIL_BACKEND='' doesn't work; must be a valid backend path. (80% 失败率)
- **** — Using SMTP backend without host/user/password fails at runtime. (50% 失败率)