> For the complete documentation index, see [llms.txt](https://docs.b2core.b2broker.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2core.b2broker.com/back-office-guide/security/email-black-list.md).

# Email black list

On this page, you can view and manage blacklisted email domains.

If a domain is blacklisted, clients can’t use email addresses from that domain to register in the B2CORE UI. For example, if `examplemail.com` is blacklisted. The email addresses such as `@examplemail.com` are blocked from registering in the B2CORE UI.

If the **Ban existing users** checkbox is enabled for a blacklisted domain, the existing clients with email addresses from that domain will lose access to the B2CORE UI.

The following information is provided on the page:

**ID**

The identifier assigned to the blacklisted email domain.

***

**Domain**

The name of the blacklisted email domain.

***

To view details or modify a blacklisted email domain, click the **Edit** button.

In the displayed popup, you can check the status of the **Ban existing users** checkbox, enable or disable it, or edit the domain name. If you made any edits, click **Save** to apply the changes.

To remove an email domain from the blacklist, click the **Delete** button.

You can export data from the page in CSV or XLSX format by clicking the respective buttons in the upper-right page corner. The file in the selected format will be automatically downloaded to your computer.


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