The Barracuda Reputation Block List (BRBL) is maintained by Barracuda Networks and queried by Barracuda security gateways as well as many independent mail servers. Listings are driven by spam traps and a real-time reputation system, and querying it at volume requires a free DNS registration with Barracuda.
Why an IP gets listed on Barracuda Reputation Block List
Blocklists add an IP when they see evidence of spam or abuse from it: mail hitting spam traps, a compromised server sending on behalf of a botnet, an open relay or proxy, or a sudden spike in unsolicited mail. Shared hosting and cloud IPs can also inherit a bad reputation from a previous tenant. Because most major mailbox providers query it, a listing here typically causes widespread bounces and spam-foldering. Treat it as urgent.
How to delist from Barracuda Reputation Block List
To delist from Barracuda Reputation Block List: first fix the underlying cause (secure the host, stop the offending mail, close any open relay or proxy), then submit a removal request through the official form:
Delisting only sticks if the root cause is fixed first. Run the full Mail Health Report to catch the SPF, DKIM, DMARC or reverse-DNS problems that often cause listings.
Frequently asked questions
How do I check if my IP is on Barracuda Reputation Block List?
Enter your mail server's IP address (or your domain) in the checker above. It queries Barracuda Reputation Block List live and tells you immediately whether the IP is listed, along with how many other blocklists list it.
How long does it take to get delisted from Barracuda Reputation Block List?
Once you have fixed the underlying issue and submitted the removal request, Barracuda Reputation Block List typically processes delisting within a few hours to a few days.
Will a Barracuda Reputation Block List listing stop my email being delivered?
Because most major mailbox providers query it, a listing here typically causes widespread bounces and spam-foldering. Treat it as urgent.