How do I change information for a Mailman subscriber?
You can change member names, email addresses and subscription options in the Membership Management section of the Mailman administration pages.
To do so, login into the administration page for your list, then click Membership Management.
You can search for the member using the Find Member search box or by browsing alphabetically through the list. Once you have located the member, click the email address to display the member's subscription options page.
To change a member's email address, enter the new address in the appropriate boxes and click Change My Address and Name. A confirmation message will be sent to the new address; the recipient must click on the link in the message to confirm the change.