Making the move from Google Apps to Zoho email. Can send/receive email except from...

Making the move from Google Apps to Zoho email. Can send/receive email except from...

Internal email addresses - those emails are still going to gmail.
My MX records have been changed and verified.  I can send and receive emails from outside the company but when I test and send to another person inside the company - it is going to Google mail and not Zoho.

HELP!