What are Talos Intelligence and Barracuda Reputation Insights?

You've built a clean sender reputation at Gmail and things look fine in consumer inboxes. But your B2B emails keep disappearing. No bounces, no complaints, just silence. The culprit is often a poor score on Talos Intelligence or Barracuda Reputation Insights, two lookup tools that corporate security appliances use to decide whether your mail ever reaches a business recipient.

Talos Intelligence is run by Cisco and provides reputation scores for IPs and domains. When a company runs a Cisco email security appliance (or any filter that pulls Talos data), it checks your IP's reputation before your message is even evaluated on content. Talos scores IPs as Good, Neutral, or Poor. A Poor rating means your mail is blocked or heavily filtered at the gateway level. Many enterprise environments never let Poor-rated senders through.

Barracuda Reputation Insights shows your status on Barracuda's own blocklist network. Barracuda hardware and cloud filters are deployed across thousands of corporate environments, especially in mid-market and enterprise companies. If your IP or domain is listed there, it can silently kill B2B deliverability while your consumer metrics look completely normal.

That gap is worth sitting with for a moment. A sender could have a Good reputation at Gmail, solid Microsoft SNDS data, and still get blocked at half their B2B destinations because enterprise filters run on entirely separate reputation networks. Consumer postmaster tools don't tell you anything about what Talos or Barracuda think of you.

If your Talos score is Neutral or Poor, or you find yourself listed on Barracuda's network, here's where to start.

• Check your sending history. Sudden volume spikes, high bounce rates, and spam complaints are the most common causes of a Poor Talos rating. Clean those up first before requesting a reclassification.
• Make sure your authentication is solid. SPF, DKIM, and DMARC all need to be correctly configured. Enterprise filters trust authenticated senders more, and gaps in your authentication will work against any reclassification request.
• Submit a review request directly. Talos has a reputation dispute form at talosintelligence.com. Barracuda has a removal request process at the Barracuda Central portal. Neither is instant, but both respond to senders who can demonstrate clean practices.
• Check your IP neighbourhood. If you're on a shared IP, other senders on that range may be dragging down the score. Dedicated IPs give you more control over your own reputation.

These tools matter most if you send to business addresses. If your list is mostly consumer domains, Talos and Barracuda are less critical to monitor. But if you're doing outbound sales, account-based marketing, or anything where the inbox sits behind a corporate firewall, you want to check both regularly alongside your standard postmaster tools.

You can also run your sending domain and IP through our free Blocklist Checker to see if you're listed anywhere that might be affecting delivery. If you're already seeing consistent B2B delivery failures and aren't sure where to start, our SOS hotline is free and we'll help you figure out what's going on.