代理 smtp 异常 退出时超时

@@ -1060,7 +1060,15 @@ class SMTP
         }
         $this->client_send($commandstring . static::LE, $command);
 
-        $this->last_reply = $this->get_lines();
+        if($command=='QUIT'&&$this->proxy_server){
+            $this->last_reply = '221 Bye.';
+        }else{
+            $this->last_reply = $this->get_lines();
+            if($command=='QUIT'){
+                $this->last_reply = ltrim($this->last_reply);
+            }
+        }
+
         //Fetch SMTP code and possible error code explanation
         $matches = [];
         if (preg_match('/^([\d]{3})[ -](?:([\d]\\.[\d]\\.[\d]{1,2}) )?/', $this->last_reply, $matches)) {