RedLegg Phishing Response Service is a managed security service that provides analyst-led validation and remediation for suspected phishing emails reported by end users. The service addresses phishing attacks that bypass secure email gateways by delivering human-validated analysis and controlled response actions. The service ingests user-reported emails through mechanisms like Outlook add-ins and processes them through a standardized workflow. Each reported email undergoes automated enrichment followed by analyst review using techniques including header inspection, raw EML analysis, and sandbox detonation. Analysts classify each submission as clean, spam, phishing, or malicious, providing definitive outcomes for security teams. For Microsoft 365 environments, the service offers optional automated remediation capabilities that execute tenant-wide removal or quarantine of confirmed malicious emails using pre-approved workflows. Remediation actions occur only after analyst validation. The service provides customized communication to both end users and security teams, with notifications tailored to organizational preferences and branding. Organizations can define custom threat categories and response workflows through customizable playbooks. RedLegg Phishing Response Service is designed to complement existing email security platforms and focuses on high-impact scenarios such as Business Email Compromise (BEC) and impersonation attacks. The service is compatible with Outlook and third-party email platforms.