Send for Shared Review Feature is Not Sending Emails

I'm trying to use the "Send for Shared Review" option under "File" to share files using my internal server. When I click the check box to send an email and proceed using the "email" button it *looks* like it works, but I don't receive the email (I used a couple of my own addresses to test it out). I have my email address in the General Settings under Project Info, so it shouldn't be because of that. Any ideas? Thanks in advance!