Reducing Phishing Attacks by 94%

The problem

Phishing volume overwhelmed the email security team. Manual domain checks could not scale to pre-delivery filtering across multiple business units.

Client stack

• Proofpoint email gateway
• Splunk SIEM
• Custom SOAR playbooks

Solution

Real-time domain and URL reputation checks via isMalicious API enriched every inbound link decision. High-confidence malicious domains auto-quarantined; suspicious items routed to analyst queue with full report context.

Impact

• 94% reduction in successful phishing deliveries
• 60% faster mean-time-to-respond on confirmed campaigns
• 85% fewer false positive escalations after confidence tuning

What's next

Expand to brand-impersonation and newly registered domain monitoring.