如何使用Go语言和Redis实现邮件系统

type Email struct {
    Sender    string
    Recipient string
    Subject   string
    Content   string
}

func sendEmail(email Email) error {
    // 连接Redis服务器
    client := redis.NewClient(&redis.Options{
        Addr:     "localhost:6379",
        PassWord: "",
        DB:       0,
    })

    // 将邮件信息保存到Redis中
    err := client.HMSet(email.Sender, map[string]interface{}{
        "recipient": email.Recipient,
        "subject":   email.Subject,
        "content":   email.Content,
    }).Err()
    if err != nil {
        return err
    }

    return nil
}

func receiveEmail(sender string) (Email, error) {
    // 连接Redis服务器
    client := redis.NewClient(&redis.Options{
        Addr:     "localhost:6379",
        Password: "",
        DB:       0,
    })

    // 从Redis中读取邮件信息
    result, err := client.HGetAll(sender).Result()
    if err != nil {
        return Email{}, err
    }

    email := Email{
        Sender:    sender,
        Recipient: result["recipient"],
        Subject:   result["subject"],
        Content:   result["content"],
    }

    return email, nil
}