These bootc are made for mailin'
summary
Builds an image-based mail stack using bootc images (Fedora Image Mode) and Stalwart for SMTP/IMAP, fronted by Caddy and run with Podman; builds are automated in GitHub Actions with Dependabot auto-merge or Renovate to achieve zero-touch updates. Produces a tiny image but hits practical problems: Distroless breaks TLS, logging and /tmp; sysusers UID drift and /var file seeds; firewall vs container port forwarding; SELinux and non-root service confinement remain unresolved. Cost estimate (~€7.1 VM + object storage) is roughly competitive with FastMail.
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chapters (7)
- 0:00Introduction
- 3:33What is BootC
- 9:30Stalwart mail server
- 14:25Building mail server
- 26:46Security challenges
- 30:59Cost comparison
- 32:48Q&A
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