Exchange 2010 - Distribution Group not receiving emails.
Background: We have a distribution group (Team - DBAs) which contains 1 internal email address and 2 external email address.
The Problem: 1) When sending an email to this distribution group no one receives the email. 2) If you type in each email address individually into the To field the email is received. 3) If you type the distribution group name, then click the + to break the group into individual addresses you receive a delivery failure to the external email addresses only.
This happens if we send the email through OWA or Outlook.