mail list is retiring
http://lists.ximian.com/mailman/listinfo/glade-devel is not working anymore.
I found a mirror on http://lists.dot.net/pipermail/glade-devel and it is retiring http://lists.dot.net/pipermail/glade-devel/2018-May/002132.html
Will be nice to migrate that mail list to mail.gnome.org and update the site