Whitelisting Email Addresses
CTFd supports the whitelisting of email domains. Only administrators can add or remove domains from the account email whitelist.
To add a domain to the whitelist:
- Go to the config page under the admin panel and select the accounts tab.
- The first option is “Account Email Whitelist” and enter all the domains can be used for the competition separated with a comma. Leaving it blank will allow users to sign up with any email.