Safe email forwarding gateway
Why Choose This Project?
Forwarding emails without security checks can expose users to phishing, malware, and data leakage risks. Attackers often exploit email forwarding rules to silently redirect confidential communications. This project builds a secure forwarding gateway that sanitizes, encrypts, and validates emails before forwarding them, ensuring users receive only safe and verified content. It is particularly useful for organizations where sensitive data is shared over email.
What You Get in This Project
A secure middleware system (gateway) that sits between incoming mail servers and the user’s inbox. It validates, sanitizes, and forwards emails safely, while applying phishing, malware, and spam detection policies.
Technology Stack
| Layer | Technology |
|---|---|
| Frontend | HTML, CSS, Bootstrap, JavaScript, React (optional for dashboard) |
| Backend | Node.js (Express) / Java Spring Boot / Python Flask |
| Database | PostgreSQL / MongoDB (for logs, rules, audit trail) |
| Mail Handling | Postfix / Sendmail / Python smtplib / Node nodemailer / Java Mail API |
| Security | SPF/DKIM/DMARC validation, VirusTotal API / ClamAV for malware scanning |
| Auth | JWT / OAuth2 for user & admin access |
| Optional | Integration with Microsoft Exchange / Gmail API |
Key Features
| Feature | Description |
|---|---|
| Secure Forwarding | Emails pass through the gateway before reaching inbox |
| Malware & Phishing Scan | Attachment and URL scanning before forwarding |
| Policy Validation | SPF, DKIM, DMARC, TLS enforcement checks |
| Content Sanitization | Removes malicious scripts, macros, or suspicious links |
| User Rules | Allow/block forwarding based on sender, domain, or keywords |
| Logging & Reports | Full audit trail of forwarded emails with security status |
| Admin Dashboard | Manage forwarding rules, view phishing/malware detection stats |
| Notifications | Alerts users if a forwarded email was blocked/cleaned |
| Quarantine System | Suspicious emails held for admin/user review |
| Encryption | Forwarded emails can be encrypted (PGP/S/MIME) for confidentiality |
How Safe Email Forwarding Gateway Works
Email Reception
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Incoming email arrives at the forwarding gateway (via SMTP).
Security Validation
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SPF, DKIM, and DMARC checks.
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TLS enforcement for transport security.
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Malware scanning for attachments.
Content Sanitization
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Removes malicious scripts/macros.
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Rewrites or blocks suspicious URLs.
Forwarding Rules Check
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Matches organization/user forwarding rules.
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Blocks/flags unauthorized redirections.
Forwarding & Alerts
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Safe emails → forwarded to intended recipient.
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Suspicious emails → quarantined + notification sent.
Security Features
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SPF/DKIM/DMARC validation for sender authenticity
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TLS-only forwarding (no unencrypted hops)
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Malware/virus scanning with ClamAV or VirusTotal API
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Quarantine system for suspicious messages
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Role-based access (Admin/User)
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Immutable audit trail of forwarded emails
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Optional end-to-end encryption (PGP/S/MIME)