# Block an Email Domain for Advocate
Your Advocate program supports flagging participants who have signed up with an email address from a suspicious domain.
We check referrals against a publicly-sourced and regularly updated [list](https://github.com/martenson/disposable-email-domains) of disposable and temporary email domains. You can also create your own custom email domain block list.
#### Create a custom domain block list
1. From the top navigation bar, select  **\[User profile] → Settings**.
2. Under *Advocate Settings*, select **Security**.
3. Under *Block Email Domains*, enter the domain/s you want to block and select **Add**.
* You can view or remove the domain under *List of Blocked Domains*.
4. Optionally,  **\[Toggle on]** **Block temporary email addresses** to block all users using a temporary email domain.
5. Scroll down to the bottom and select **Save**.
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