diff --git a/server/internal/auth/email.go b/server/internal/auth/email.go
index d32ad02..4467069 100644
--- a/server/internal/auth/email.go
+++ b/server/internal/auth/email.go
@@ -73,6 +73,12 @@ func (h *Handlers) EmailCode(c *gin.Context) {
 	}
 
 	code := randCode()
+	// ⚠️ 开发期便利【上线阻断项】：mock 邮件（SMTP 未配置）时验证码固定 888888，
+	// 免翻日志。真实 Mailer 接入后自动回到随机码；若生产误配 mock，
+	// 任何人可用固定码登录任意邮箱——pickMailer 的 TODO 必须先解决。
+	if _, mock := h.Mailer.(MockMailer); mock {
+		code = "888888"
+	}
 	if err := h.RDB.Set(c, store.KeyAuthEmail(email), code, emailCodeTTL).Err(); err != nil {
 		c.JSON(http.StatusInternalServerError, protocol.NewAPIError(protocol.ErrInternal))
 		return