Dovel is a SMTP server that sends and receives emails acording to a simple configuration file and an extensible hook system. It is designed to be simple and easy to use, and will remain so.
Reacher is a powerful, open-source email verification API.
Mautic processing of email webhooks from Omnivery, Mailgun and similar Email Service Providers is a bit limited due to insufficient underlying model where we store information coming from webhooks....
Bichon is a lightweight, high-performance, self-hosted email archiver built in Rust. It synchronizes emails from IMAP servers, indexes them for full-text search, and provides a clean WebUI and REST...
The Riamu Mail App is a distributed email application that solves many problems and makes distributed email possible. Email was meant to be distributed and free.
Brian Mayer
Reacher