Fix for recording seen-by, add md5 to message body, fix incorrect log of dispatching messages

app/Models/Echomail.php

@@ -64,7 +64,7 @@ final class Echomail extends Model implements Packet
 				]);
 			}
 
-			$model->seenby = $model->seenby->merge($export_ao);
+			$model->seenby = $model->seenby->merge($export_ao)->pluck('id')->toArray();
 			$model->save();
 		});
 	}