Not able to send e-mail between exchange 2013 and 2007 users

We have recently setup a new Exchange 2013 in a 2007 environment.  I currently cannot send e-mails from a 2013 to 2007 mailbox or from a 2007 to 2013 mailbox.  Currently everything is being pointed to the 2007 server for client access and mailflow.  Any ideas?
Chris RiceAsked:
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IvanConnect With a Mentor System EngineerCommented:

if you are doing coexistence, mail flow should point to Exchange 2013, and there should be legacy name in DNS and certificate.
You need to create send connector as well on 2013.

There are some guides like: 

Chris RiceAuthor Commented:
Yeah I'll be making all of the mail flow/DNS changes to Exchange 2013 tomorrow night, but I would have thought I should be able to send between the two servers now without any issues.  Currently, from a 2013 mailbox, it just sits in the drafts folder when sending to a 2007 mailbox, and with a 2007 mailbox sending to a 2013 mailbox, it goes into the sent items, but it is never received by the 2013 mailbox nor are there any records of the e-mail being sent or receiving in the message tracking logs.
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