11notes/smtp repository overview

⁠🏔️ Alpine - Stalwart SMTP

Simple SMTP relay with queues using Postgre and Redis

⁠SYNOPSIS

What can I do with this? This image will provide you with a simple SMTP relay for ingress at your edge to filter and relay incoming emails. This image supports only PostgreSQL and Redis as directory and storage backend. It is intentionally slimmed down to provide ingress/egress at your edge, this is not a full email server, only the SMTP part. Use it for distributed ingress in different locations and relay all emails to a central core. Can be used for distributed egress as well.

⁠VOLUMES

• /smtp/etc - Directory of configuration files

⁠RUN

docker run --name smtp \
  -v .../etc:/smtp/etc \
  -d 11notes/smtp:[tag]

⁠DEFAULT SETTINGS

⁠ENVIRONMENT

⁠PARENT IMAGE

• 11notes/node:stable⁠

⁠BUILT WITH

• stalwart smtp⁠
• alpine⁠

⁠TIPS

• Only use rootless container runtime (podman, rootless docker)
• Allow non-root ports < 1024 via echo "net.ipv4.ip_unprivileged_port_start=53" > /etc/sysctl.d/ports.conf
• Use a reverse proxy like Traefik, Nginx to terminate TLS with a valid certificate
• Use Let’s Encrypt certificates to protect your SSL endpoints

⁠ElevenNotes^™️

This image is provided to you at your own risk. Always make backups before updating an image to a new version. Check the changelog for breaking changes.