There are a few ways to get into the configuration pages for your Mailman mailing list.
The easiest way to enter the configuration pages is to use the Admin Portal Page's "What Lists Do I Own?" webtool.
Another option is to visit Mailman administrative links (https://email.rutgers.edu/mailman/admin) and append your list name to the end of the URL. For example: https://email.rutgers.edu/mailman/admin/my_list.
Once you have the URL, we suggest you bookmark it to make it easier for you to quickly get into your configuration pages.