Mailman
From Willipedia
Mailman is the name of the software that runs WSO's listservers, which currently number over 800.
Subscribing/unsubscribing
You can subsribe to or unsubscribe from Mailman listservers over the web. A list of all public lists can be found here:
http://wso.williams.edu/mailman/listinfo
Private lists are accessible at that address with "/LISTNAME" appended. Just navigate to the list you want to join or leave, and there will be instructions.
In addition, some options are available through an email interface. To join a list, send an email to
listname-join@wso.williams.edu
To leave a list, just email
listname-leave@wso.williams.edu
Managing a listserver
Mailman has a fancy web interface so that list owners can modify all aspects of a list: the list's members, whether replies default to a particular person or the entire list, and about 80 other options. Just visit wso.williams.edu/mailman/admin/LISTNAME (where LISTNAME is the name of your list) to see the control panel.
Creating a listserver
Listservers are granted to student groups, entries, and things that seem like productive uses. To apply for a WSO listserver, visit:
http://wso.williams.edu/lists/create
Mailman is free software; see the the Mailman project home page for more information.