I was surprised that I did not received any annoying message like "90% of your email quota has been used", having found several huge emails (each is 9+ MB) in my INBOX since last night. Then I wondered "what is wrong about my email account today". After doing a little search, I realized that there's nothing wrong, but something right:
IS&T has finally doubled the default Email Quota to 1 GB!
Details can be found at http://web.mit.edu/ist/topics/email/quota-upgrade.html (posted on 09/06/2006). The original quota when I came here was 250 MB.