I have a VPS server which I've configured with a hostname of mydomain.com.

I use Google Apps for my email account management and email aliases.

When a cron job or some other system event sends an email to an email account on mydomain (e.g. myemail@mydomain.com), it doesn't seem to pass the message onto Google Apps to send onto the address. If I configure some other domain as the recipient email it sends through fine.

myemail as described above, is not an account on the host.