omerreifenberg/email-scorer

Email Scorer is a Gmail Add-on that analyzes opened emails and returns an explainable verdict (Safe, Suspicious, Malicious), a 0–100 risk score, confidence level, and up to four human-readable findings. It’s intended for Gmail users and security teams who want in-context phishing/malware detection and explainability. Key features: - Thin Apps Script UI that extracts message metadata, headers, body and links and posts to a FastAPI backend. - Backend implements 11 weighted technical signals (SPF/DKIM/DMARC, reply-to mismatch, display-name spoofing, suspicious links, typosquatting, etc.), a real-time URLhaus lookup, and dual AI content analysis (Anthropic Claude + OpenAI GPT-4o). - Final score = 60% technical + 40% AI; URLhaus hits and confidence adjustments affect results. - Security controls: input truncation, prompt-injection mitigations, in-memory-only processing, API-key auth, and separate AI error handling. - Deployable backend (Python 3.11+, uvicorn) and simple Apps Script installation.

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