> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abusix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Barracuda Email Firewall

To add Guardian Mail:

Go to BLOCK/ACCEPT -> [IP](https://abusix.com/glossary/internet-protocol-address/) Reputation in Barracuda, and under Custom External RBLs, add:

```
<APIKEY>.combined.mail.abusix.zone
```

Replace \<APIKEY> with “**Your API key”** from your account in [app.abusix.com](http://app.abusix.com).

And select “BLOCK.”

Once set up, you will see “Blocked” items in the Message Log, and within those, the messages that Guardian Mail blocked.