Barracuda Reputation

Barracuda Reputation is a free lookup service that checks whether your sending IP or domain is listed on Barracuda's own blocklists. Barracuda's filtering systems protect millions of inboxes, so a listing here can directly impact your mail flow to those networks. The tool gives you detailed reason codes and, if you're listed, clear paths to request delisting once you've fixed the underlying issue.

Use this alongside Spamhaus and other major RBL checks when diagnosing delivery problems. It's especially relevant if you're sending to enterprise domains that run Barracuda email security, since they may be filtering aggressively if you're flagged. The delisting process is straightforward and usually takes hours to take effect once approved.