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A lightweight SMTP server written in Go, made for receiving large volumes of mail. To be used as a package in your Go project, or as a stand-alone daemon by running the "guerrillad" binary. Supports MySQL and Redis out-of-the-box, with many other vendor provided processors, such as MailDir and even FastCGI! It's an SMTP server written in Go, for the purpose of receiving large volumes of email. It started as a project for GuerrillaMail.com which processes millions of emails every day, and needed a daemon with less bloat & written in a more memory-safe language that can take advantage of modern multi-core architectures. The purpose of this daemon is to grab the email, save it, and disconnect as quickly as possible, essentially performing the services of a Mail Transfer Agent (MTA) without the sending functionality. The software also includes a modular backend implementation, which can extend the email processing functionality to whatever needs you may require.
Features
- Multi-server. Can spawn multiple servers, all sharing the same backend for saving email
- Config hot-reloading. Add/Remove/Enable/Disable servers without restarting. Reload TLS configuration, change most other settings on the fly
- Graceful shutdown: Minimise loss of email if you need to shutdown/restart
- Be a gentleman to the garbage collector: resources are pooled & recycled where possible
- Modular Backend system
- Modern TLS support (STARTTLS or SMTPS)
Project Samples
