Ghost User
2019-11-27T19:49:53+01:00

### One-sentence description

Block changing your email address in the administration to members.thalia.nu

### Current behaviour / Reproducing the bug

Users can change their email address to members.thalia.nu.

### Expected behaviour

No changing to addresses using this domain. Since we do not want these addresses in the administration. We cannot rely on them to stay active.