How to get delisted from the Barracuda Reputation Block List
The Barracuda Reputation Block List (BRBL) flags IPs sending mail that Barracuda's systems associate with spam or abuse, and Barracuda publishes its own free lookup and removal-request tools for checking and clearing a listing. This guide covers that public procedure only — no outcome or timeline is guaranteed.
By AdminKit team, Netbase JSC · Updated October 22, 2026
What the Barracuda Reputation Block List is
The Barracuda Reputation Block List (BRBL) is a DNSBL run by Barracuda Central, separate from and independently maintained from other blocklists like Spamhaus. It flags IP addresses that Barracuda’s own sensor network and customer base have observed sending spam or other abusive mail, and it’s queried by any mail server configured to check against it — not only servers running Barracuda’s own appliances.
Step 1: confirm the listing
Before requesting removal, confirm the IP is actually listed and that Barracuda is the list in question — a mail delivery problem can have several unrelated causes (SPF/DKIM/DMARC misconfiguration, a different blocklist, a full mailbox on the receiving end). Use AdminKit’s blacklist check, or Barracuda’s own reputation lookup tool, entering the specific IP sending your mail.
Step 2: find and fix the cause first
A Barracuda listing, like other reputation-based blocklists, reflects observed traffic rather than a single manual flag — removal without addressing the cause tends not to last. Before requesting removal:
- Check for a compromised device or account sending spam through your network or mail server.
- Confirm your mail server isn’t operating as an open relay, and that SPF, DKIM and DMARC are correctly configured, since a missing or broken DMARC policy can make spoofed mail easier to send as your domain.
- Rule out a shared-IP cause: if what is my IP shows signs of CGNAT or shared hosting, abuse from another customer on the same address could be the actual source, not anything on your own network.
Step 3: submit the public removal request
Once you’re confident the cause is addressed, use Barracuda Central’s own Reputation System Removal Request page. The form asks for:
- The sending mail server’s IP address.
- A contact email address and phone number.
- An optional explanation of the cause and the fix applied.
Barracuda’s own page states that removal requests are typically reviewed within hours once a valid explanation is provided — treat that as a general expectation rather than a committed SLA, particularly if the listing’s cause isn’t clearly described in the request.
If it happens again
A fresh listing shortly after removal almost always means the underlying cause wasn’t actually resolved, or the IP is shared and a different customer on it is now causing the same pattern. In the shared-IP case, requesting removal repeatedly addresses only the symptom — the durable fix is typically a dedicated IP from your provider or hosting the mail service away from a flagged shared range.
This guide is general information, not a security audit of your specific network — see our disclaimer for what AdminKit's guidance does and does not commit to.
Frequently asked questions
What does the Barracuda Reputation Block List actually check?
It lists IP addresses that Barracuda Central's own systems have observed sending spam or other abusive mail traffic, based on data gathered across Barracuda's customer base and sensor network, similar in purpose to other DNSBLs like Spamhaus but run as a separate, independently maintained list.
Do I need a Barracuda product to check or request removal?
No. Barracuda Central's lookup and removal-request tools are publicly accessible without owning a Barracuda appliance or subscription — they're run as a community reputation service, not a customer-only feature.
What information does the removal request need?
Barracuda's public removal-request form asks for the email server's IP address, a contact email address, a phone number, and an optional explanation of what caused the listing and what was fixed — providing a clear explanation tends to make review faster, though Barracuda does not publish a guaranteed turnaround.
How long does a Barracuda removal request take?
Barracuda states that requests are typically reviewed within a matter of hours once a valid explanation is provided, but this isn't a guaranteed SLA — treat it as a general expectation, not a commitment, especially for first-time or unclear requests.
Will I get re-listed if I didn't fix the actual cause?
Yes — like other reputation-based blocklists, Barracuda's listing is based on observed traffic, not a one-time flag. If the same IP keeps sending the traffic pattern that caused the original listing, it's likely to be re-listed regardless of how many removal requests are submitted.
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