推广频率更改，半个月发一封是可行的

application/api/controller/EmailClient.php

@@ -2282,7 +2282,7 @@ class EmailClient extends Base
         set_time_limit(120);
 
         $sendDate     = date('Y-m-d', strtotime('+1 day'));
-        $noRepeatDaysDefault = 30;
+        $noRepeatDaysDefault = 15;
 
         $factories = Db::name('promotion_factory')
             ->alias('f')
@@ -2354,7 +2354,7 @@ class EmailClient extends Base
             $expertType = intval($factory['expert_type']);
 
             // 内部受众（type∈{1..4}）：默认 60 天频次（约稿场景）；外部 expert 库（type=5）沿用 30 天
-            $noRepeatDays = $expertType === 5 ? $noRepeatDaysDefault : 60;
+            $noRepeatDays = $expertType === 5 ? $noRepeatDaysDefault : 20;
 
             if ($expertType === 5) {
                 $fields = $this->resolveFieldsByFetchIds($factory['fetch_ids']);