Domain & Exchange Server 2013

Hey Guys,

I am running a Windows Azure 2012 Server with Exchange 2013 with a test domain (sdgov.onmicrosoft.com)

I have successfully created a few accounts and have them sending out emails no problem. My problem is when I am outside the internal network (so say I email from ****@gmail.com). The email bounces back at me saying this:

Postfix; Host or domain name not found. Name service error for mane=pending-onmicrosoft.com type=AAAA: Host not found> #SMTP#

Any help?

Andrew