Google Apps Deployment Quick Start (Apps100)

Some customers may have several domains registered for their company yet want all mail delivered to their users at their primary domain. This is implemented using domain aliasing. This way all mail delivered to the domain alias (  is treated as if it were delivered to the primary domain (  In this exercise you will:
Note: It can take 12-24 hours for your MX records to propagate through the Internet. 

It is common when running a pilot as part of a customer deployment to configure dual-delivery which forwards mail from the current mail system to the Google Apps pilot users at a domain alias ( Additionally, is an example of a subdomain which is configured as a domain alias in Google Apps.

Reference Material