Threat Intelligence

Obvious Anthropic-Themed Phishing Emails Are Slipping Past Leading Email Security Tools

Dark Reading · 30 Oct 2026
Key Takeaway Do not rely on your email filter alone: train staff to spot and report suspicious messages, especially those impersonating well-known technology brands.

Dark Reading reports that phishing emails themed around Anthropic are getting past some of the industry-leading secure email gateway (SEG) products. These gateways are the filters many organisations rely on to stop malicious messages before they reach staff inboxes.

What makes the finding notable is that the emails are described as obvious phishing attempts with numerous red flags. In other words, these are not carefully crafted messages that would fool a trained eye. Even so, they are somehow making it through tools that businesses depend on as a first line of defence.

For small businesses, the lesson is that a email security product is not a guarantee. Messages that look suspicious may still land in an inbox, so staff awareness remains an important safeguard. The summary provided does not detail which products were affected or how the emails evaded detection, so businesses should check with their email security provider for further information.

phishing email security Anthropic secure email gateway SMB

Summarised by CISO AI from Dark Reading, written with Claude Sonnet 5.5. We link back to every original so you can read it yourself.