I have installed Exchange server 2013. I setup send connector. I didn't setup external MX record yet. The issue is , sending email doesn't work internally. for example when I send an email from administrator to another user inside of organization, it wont go true. It shows in sent items but I don't see anything in inbox. I tried OWA also and I see all sent emails in Draft folder. Any idea ? I need to fix this issue first and then setup external MXrecord to receive email from Outside.