So I opened an ITS ticket. BGSU's Symantec Brightmail Gateway was not quarantining the email, but it surely was not getting delivered, as evident when I emailed the tech while on the phone and he never got my email.
The second, separate issue comes from the automated emails that Movable Type sends out when someone registers on our site. The email is for verification purposes, to prevent spam. These emails are not getting delivered to bgsu.edu email addresses either, including my own. If I look at the Unverified accounts in MT, most of them have bgsu.edu email accounts.
After talking to our host, Liquid Web, I have found out via an exim log file that the automated emails are indeed sent, and the BGSU email server is accepting them, but they are not getting delivered, as I tried twice today to my bgsu.edu email address.
This is a major problem, as our main user base are BGSU students and staff. So I am back to talking to ITS support and hopefully an email administrator about this problem. You can hit the jump to see the relevant mail server log.