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....
Brian Mayer
Reacher