Maybe whatever server is sending the keys out is down.
I don't think that was the problem. Whenever a key is sent out I'm BCCed on the email so I get a copy too. What seems to happen most of the time is that either they purchased using an Alternate Payment Method where the key is not sent out automatically or the key is marked as spam (which is isn't).
problem resolved thx
Thanks for letting everyone know this was resolved.
And to everyone else... Let's try and keep the off topic comments out of the help threads.