So, now…you can redirect your domain email you set it up to another gmail e-mail too.
just go to upper right corner “settings” > “Email settings”….and follow this steps from google (Forward mail to another account ) .
Yey.
Now, you can receive both email in one gmail account. When you get the email for domain, simply login (switch users) to domain email that you set up with google app to reply.
** If you don’t want your “domain MX” to be pointed to Google.. maybe you should not use these steps…