Google Apps -> Settings for Gmail -> Advanced settings -> Default Routing


Does all that... and you can force many things now.

There is also in "General Settings" under "Advanced Settings" (yeah I know)


"Catchall routing should only be used if you really need it as spammers often try to guess email addresses in your domain. The increased mailflow from spam can lead to the account becoming locked or in legitimate messages being deferred, delayed or bounced. If you must use a catchall make this an account dedicated to this function, rather than an active user or admin address and make sure to clean up the spam in the account regularly."

I pay for 2 accounts per year for this reason and pay for 100GB of storage for that account only. Mind you I went to less than 1GB of storage, from many many multi-GBs of mail on my old server, without losing a single message.