Updates to CentOS today and last night caused major problems.
There is a change in id mapping that is causing problem with mail, an update also overwrote my 2.4.6 Apache installation with an ancient version, and it caused some other issues.
The web server has been restored, I need to do an emergency reboot to get the
id mapping issues back in sync, and then will have to move mailboxes back in place by hand. Please be patient, I am working on correcting this as fast as possible.