diff --git a/app/Jobs/HomeFeedPipeline/FeedInsertRemotePipeline.php b/app/Jobs/HomeFeedPipeline/FeedInsertRemotePipeline.php
index 97ca56e94..006dfaced 100644
--- a/app/Jobs/HomeFeedPipeline/FeedInsertRemotePipeline.php
+++ b/app/Jobs/HomeFeedPipeline/FeedInsertRemotePipeline.php
@@ -16,11 +16,23 @@ use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Queue\Middleware\WithoutOverlapping;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Support\Facades\Log;
+use Throwable;
 
 class FeedInsertRemotePipeline implements ShouldBeUniqueUntilProcessing, ShouldQueue
 {
     use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
 
+    /**
+     * Remote statuses published more than this many days ago are not
+     * inserted into home feeds.
+     *
+     * The home timeline is scored by status id, and a remote status gets
+     * its id when we first store it, not when it was published. Without
+     * this guard an old post that is fetched for the first time (a boost,
+     * an edit, a reply to it) lands at the top of every follower's feed.
+     */
+    public const MAX_AGE_DAYS = 7;
+
     protected $sid;
 
     protected $pid;
@@ -101,6 +113,10 @@ class FeedInsertRemotePipeline implements ShouldBeUniqueUntilProcessing, ShouldQ
             return;
         }
 
+        if (self::isTooOld($status)) {
+            return;
+        }
+
         $ids = FollowerService::localFollowerIds($pid);
 
         if (! $ids || ! count($ids)) {
@@ -132,4 +148,19 @@ class FeedInsertRemotePipeline implements ShouldBeUniqueUntilProcessing, ShouldQ
             }
         }
     }
+
+    public static function isTooOld(string|\DateTimeInterface|null $createdAt): bool
+    {
+        if ($createdAt === null || $createdAt === '') {
+            return true;
+        }
+
+        try {
+            $published = now()->parse($createdAt);
+        } catch (Throwable) {
+            return true;
+        }
+
+        return $published->lt(now()->subDays(self::MAX_AGE_DAYS));
+    }
 }
diff --git a/app/Util/ActivityPub/Helpers.php b/app/Util/ActivityPub/Helpers.php
index 1c87aa75c..6c91d2eab 100644
--- a/app/Util/ActivityPub/Helpers.php
+++ b/app/Util/ActivityPub/Helpers.php
@@ -989,7 +989,8 @@ class Helpers
     {
         if (
             config('instance.timeline.network.cached') &&
-            self::isEligibleForNetwork($status)
+            self::isEligibleForNetwork($status) &&
+            ! FeedInsertRemotePipeline::isTooOld($status->created_at)
         ) {
             $urlDomain = parse_url($url, PHP_URL_HOST);
             $filteredDomains = self::getFilteredDomains();