If you want to change the address your list subscriptions are sent to, you should unsubscribe the old address, and then subscribe the new address. Detailed instructions on how to unsubscribe and subscribe from a mailing list are available by browsing the information page about that list in our Mailing List Directory.
You can unsubscribe your old address from the list by sending the command
to the firstname.lastname@example.org e-mail address.
If you aren't sure what e-mail address is subscribed, or if this doesn't work when you try it, then you should contact the list administrators to help you out. Please make sure you include the old e-mail address that needs to be unsubscribed, and the lists you want changed.