The Joker.com system identifies you using your pgp-signature and your email-address, so you have to provide a new pgp-key, if you want to change your robot-email-address. Without changing the pgp-key, our system cannot grant you access to the domains, you have registered at joker.com.
Please, follow the 3 steps below to change your robot-email-address.
Create a new contact with your new email-address using the mail-gateway.
Change the billing-c of all your domains using this new contact, which contains the new robot-email-address. Use the "list domains"-request for a listing of your domains.
Go to https://joker.com/index.joker?mode=resellerpages&stage=step13b and provide your new email-address and your new pgp-key and wait for our response mail.