Whitelisting email domain on Anti-Splog?

We're running Anti-Splog to catch the evil script kiddies, and it's working great, but it's also catching a lot of our students because they register with sites containing numbers (like course codes ENGL301 etc…). Is there a way to whitelist an email domain (say, everyone with an @ucalgary.ca email is trusted) so they don't get splogged? The regex filters let me block, but don't let me override and whitelist. Is there a way to do that?