# Emails Blacklist

**Emails Blacklist** allows setting email address patterns that are not allowed to sign-up to the service. This is useful in cases you would like to prevent certain email address or domain names from registration to the service. 

![Emails Blacklist blocks hotmail.com gmail.com and .edu domain names](/files/-Lr3YIRH-HRywqsrd3lW)

### How to add a new Blacklist rule

1. Click  `Add Rule`  to add a new rule
2. In the text-box enter a pattern. (For example `blacklisteddomain.com`)
3. Click on `Save Blacklist` to save changes


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.jovianx.com/documentation/settings/customer-console/emails-blacklist.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.