Awesome GitHub RepositoriesSMTP Protocol Validations

This project is an email verification tool that checks if an email address exists and can receive messages without sending an actual email. It provides these capabilities through a programmatic HTTP API and a local command line interface. The system distinguishes itself by combining SMTP handshake verification and DNS record resolution with a risk analysis tool that detects disposable addresses, role-based accounts, and catch-all domains. It also includes a metadata aggregator to retrieve public profile information and imagery associated with a specific email address. The broader capability

This project is a self-hosted email verification system and API designed to validate email existence and clean mailing lists on private infrastructure. It functions as a deliverability tool that confirms if email addresses are reachable by communicating with mail servers via the SMTP protocol without sending actual messages. The system is distinguished by its high-volume SMTP infrastructure, which utilizes a stateless worker architecture and message queue task distribution to scale validation tasks. It includes an SMTP proxy gateway that routes requests through SOCKS5 proxies to mask server i

Maddy is a modular mail server that assembles a complete email system by connecting small, single-purpose modules through a declarative configuration file. Rather than a monolithic stack, it lets operators compose message processing, storage, authentication, and security enforcement from interchangeable building blocks, with each module handling a specific function like receiving SMTP connections, verifying credentials, or applying policy checks. The server distinguishes itself through its flexible authentication and security architecture. It delegates user verification to external systems in