[Freeipa-users] unregister old EMail address on this mailing list?

Hi folks, I have a new EMail address. Problem is, there is no option on [Manage subscription] to replace the EMail address. The old address is not available to send an unsubscribe to mailman, either. I could subscribe my new address via mail to mailman, but https://lists.fedorahosted.org/admin/accounts/subscriptions/ doesn't show these subscriptions, either. Since the old address is still valid for receiving mails I get all EMails twice now. How can I unsubscribe the old EMail address from freeipa-users and freeipa-devel? Every helpful comment is highly appreciated Harri