# Email Now Available as Custom Rules Parameter

_September 14, 2020_

> **⚠️ Warning**
>
> This release note is more than two years old and may no longer reflect
> current behavior. View the
> [latest release notes](/minfraud/release-notes/).

We have released an additional input parameter for use with custom rules.
Customers of
[minFraud Score, minFraud Insights, and minFraud Factors](/minfraud) can now use
email address to serve as the basis when creating a custom rule:

- Email address: `/email/address/` – a valid email address or an MD5 of the
  lowercased email used in the transaction.

For more information on implementing custom rules, see the
[Custom Rules Guide on our Support Center](https://support.maxmind.com/knowledge-base/articles/use-custom-rules-and-dispositions-minfraud-maxmind).