Here's how to unsubscribe from a listserv through the U of T listserv site.
3. If you see a Log in link in the top right corner of the page, click it to log into your account. In the Subscriber's Corner area, you'll see all the lists you're currently subscribed to. Put a check mark in the box next to the name of the list you'd like to unsubscribe to and click on the down arrow in the drop-down menu below the lists. Choose Unsubscribe and click Update in the bottom right corner of the page.