Mail Merge Problems

[jmac12]

I'm trying to send out a mass email using mail merge and I'm using Microsoft Office 2011 for Macs. I have created my list of contacts in Excel and merged my contacts into Word to create a form letter. I have successfully created the merge and my contacts all appear correct. Once I select who the email will be sent to, I click Mail Merge to Outbox. At this point, Outlook pops up but nothing is sent. I tried looking in drafts but the email is no where to be found. Outlook is my default email preference.

Any ideas what could be wrong?