Users list mail issue

Hi, It seems that I am receiving some emails from users list after a long delay. For example this thread: https://lists.ovirt.org/archives/list/users@ovirt.org/thread/5N6N4BHF6ZFJ... I have received only 2 emails from this thread, and my colleagues did not receive the one I sent 4 hours ago. Any idea what is the problem? Thanks, Freddy