Remails: A European Mail Transfer Agent

4 months ago

Remails is a European Mail Transfer Agent (MTA) designed for transactional emails like verification codes and password resets.
The project started with a single VPS and evolved into a high-availability Kubernetes setup with managed PostgreSQL.
High availability is ensured through multiple replicas of components, load balancers, and independent backups.
Remails uses a 'bring your own IP' (BYOIP) approach to manage email reputation and avoid spam filters.
The architecture includes separate inbound and outbound SMTP services, with outbound services running as DaemonSets for IP control.
A lightweight message bus facilitates communication between components, with fail-safes to ensure eventual email delivery.
Remails is in public beta with a free tier and plans for future features like email notifications and privacy enhancements.

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