[cobalt-users] One Qube2, multiple MX records?

["Rob Rosenberger" <junkmail@xxxxxxxxxx>]

I have qube2.x.com and qube2.y.net.  I want them to serve as MX alternates for
each other.  However, I can't seem to set up the Qubes to do it.  If
qube2.x.com accepts email for y.net, it tosses the message as undeliverable. 
Does anyone know what I did wrong?