mail-relay

🐳 A bring-your-own-SMTP-server mail relay with REST API and web UI

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• Go

MailSecOps is an email and mail gateway security testing tool. With this script, you can perform mail spoofing, relay tests and security checks for a specific domain. The tool also helps to verify SPF, DMARC, SSL/TLS and other security tests.

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• Python

SMTP Mux is a programmable SMTP proxy that multiplexes outbound email at runtime via plugins, allowing fine-grained control over delivery based on sender, recipient, domain, volume, health checks, or custom policies.

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• Go

A full-featured Laravel integration for Hyvor Relay, including a custom mail transport, typed Console API client, webhook handling with signature verification, event dispatching, and testing fakes for Hyvor-hosted or self-hosted Relay endpoints.

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• PHP

Lightweight SMTP proxy relay that forwards emails through an upstream server with header sanitization for privacy. Strips source-identifying headers, replaces envelope sender, and generates new Message-IDs. Docker-ready, single static binary.

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• Go

Docker mail relay

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• Shell

Postfix Relay setting X-Envenlope-To

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• Dockerfile

Find open services

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• Lua

Dockerized Postfix SMTP Relay

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• Dockerfile

📧 Enhance email reliability with SmtpMux, a pluggable SMTP proxy that ensures seamless communication between your apps and mail providers.

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• Go