1. The Challenge

Telegraph Media Group; one of the UK’s leading media organisations relies heavily on email for editorial communication, partner coordination, and commercial operations.
With increasing volumes of phishing, impersonation, and business email compromise (BEC) attacks targeting high-profile teams, the organisation needed stronger protection and clearer visibility into threat patterns.

Challenges included:

• sophisticated phishing campaigns targeting senior staff
• rising account takeover attempts
• inconsistent filtering across shared and high-volume mailboxes
• limited visibility into threat trends and compromised identities
• manual security operations creating delays and inefficiencies

To protect sensitive communications and reduce operational risk, the organisation required an advanced, proactive email security layer.

2. Our Approach

Peritus deployed an AI-powered email security enhancement designed to identify, block, and learn from emerging threats targeting the organisation.

Our work included:

• Implementing AI-driven detection for phishing, BEC, and impersonation attacks
• Analysing sender behaviour, identity spoofing, and suspicious patterns
• Enhancing authentication and configuration across Microsoft 365
• Reducing reliance on manual triage through automated workflows
• Providing insights into threat categories, targeted teams, and risk trends
• Guiding improvements to identity protection and conditional access policies

This strengthened the organisation’s security posture while reducing pressure on internal teams.

3. The Outcome

The engagement delivered significant improvement in email security and operational efficiency:

• 75% reduction in high-risk phishing and impersonation attacks
• Automated detection and response, reducing time-to-mitigate incidents
• Enhanced protection for high-target roles (editorial, leadership, commercial)
• Stronger alignment between identity controls and email security
• Clear reporting for technology and security leadership
• Reduced risk of account takeover and compromised credentials

Telegraph Media Group gained deeper visibility into threats and a more resilient communication environment.

“Peritus helped us get ahead of increasingly sophisticated email threats. Their AI-led approach strengthened our defences and reduced the operational load on our teams.”    

— Information Security Lead, Telegraph Media Group

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