Google App Hosting and admin emails
http://www.google.com/support/a/bin/answer.py?answer=33389&hl=en
The Google Apps Team automatically monitor abuse@yourdomain.com and postmaster@yourdomain.com to ensure that they can properly address all reports of spam, abuse, and technical issues.
If you'd like a copy of messages sent to abuse@yourdomain.com and postmaster@yourdomain.com, create email lists for both addresses, and add yourself as a recipient:
- abuse @ your.domain Email list 2 recipients Google Support,your-admin-user
- postmaster @ your.domain Email list 2 recipients Google Support,your-admin-user
Since abuse and postmaster are reserved aliases, you won't be able to use them as usernames or nicknames. If you'd also like to trap emails sent to admin and webmaster click on User Accounts chose your-admin-user and create an aliases for admin and webmaster by adding nicknames for admin and webmaster !