files attached get 600 permission

hi.
Postie is a great plugin. I use it for a website that involves inputs from un-registered users I work with, and posting by mail is just what I need.
My only problem is that the files attached get 600 permission so they cannot be downloaded of seen. I need to change permissions manually which is disturbing.
I guess that line 1953 at postie-functions.php should do that:

// Set correct file permissions
    $stat = stat(dirname($new_file));
    $perms = $stat['mode'] & 0000666;
    @ chmod($new_file, $perms);

https://wordpress.org/plugins/postie/