diff --git a/post.php b/post.php
index a1d50a55..437f45f0 100644
--- a/post.php
+++ b/post.php
@@ -391,12 +391,15 @@ function handle_report(){
 
 
         if(isset($config['matrix'])){
-            $slackmessage = $config['domain']  . "/mod.php?/" . $board['dir'] . $config['dir']['res'] .  ( $thread['thread'] ? $thread['thread'] : $id ) . ".html"  .  ($thread['thread'] ? '#' . $id : '') . ' \\n ' . $reason . '\\n ' . $postcontent . ' \\n ';
-            $url =  $config['matrix']['host'] . "/_matrix/client/r0/rooms/" . $config['matrix']['room_id'] . "/send/m.room.message?access_token=" . $config['matrix']['access_token'];
-            $ch = curl_init($url);
+            $trimmed_post = strlen($thread['body_nomarkup']) > 280 ? '[...]' : '';
+            $postcontent = mb_substr($thread['body_nomarkup'], 0, 280) . $trimmed_post;
+            $reported_post_url = $config['domain'] . "/mod.php?/" . $board['dir'] . $config['dir']['res'] . ( $thread['thread'] ? $thread['thread'] : $id ) . ".html";
+            $matrix_message =  $reported_post_url . ($thread['thread'] ? '#' . $id : '') . ' \\n ' . $reason . '\\n ' . $postcontent . ' \\n ';
+            $post_url =  $config['matrix']['host'] . "/_matrix/client/r0/rooms/" . $config['matrix']['room_id'] . "/send/m.room.message?access_token=" . $config['matrix']['access_token'];
+            $ch = curl_init($post_url);
             $post_data = json_encode(array(
                     "msgtype" => "m.text",
-                    "body" => $slackmessage
+                    "body" => $matrix_message
             ));
             curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
             curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);