How can I change my e-mail address in the aLobby?

Note that you always use a valid and identical email address in aLobby and Forum. How you can change your email address in the forum is described here.

Call up https://liga.siedler3.net.
- Yes, the league page. Why? Because it's the only central place where you can log in yourself apart from the aLobby and manage some settings for your account.
Log in there with your aLobby login.
Then go to “Settings” on the left.
There you will find the section “Change e-mail address”. Enter your new e-mail address here in the field.
Go to Save, done.