tailwart/acl-snippet.hujson
Wayne Hayes 2eb8a0c225 Scaffold tailwart: Stalwart mailbox as a Tailscale sidecar
Over-engineered play stack for infinidim.net — Stalwart wired into the shared
Postgres + Redis + Garage S3 over the tailnet, with no WAN presence. Public
mail ports are fronted by a separate caddy-l4 layer-4 proxy (caddy/) that can
run on any tailnet host tagged tag:reverse-proxy — decoupled from the mailbox.

- docker-compose.yml: ts-stalwart sidecar + stalwart, backends via MagicDNS
- config/config.toml: PG (data/fts) + Redis (lookup) + S3 (blob) strawman
- caddy/: xcaddy build with caddy-l4, JSON layer-4 mail proxy, own compose
- acl-snippet.hujson: tag:stalwart owner + backend/edge grants
- .env.example + gitignored .env (pulled from shared infra)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-03 22:25:38 -04:00

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// tailwart — merge into your live Tailscale policy (admin console).
// Snippet, not a full policy. Kept here so an upstream pull of any other repo
// can't clobber it.
// 1) tagOwners — add (self-ownership required for auth-key node creation):
// "tag:stalwart": ["autogroup:admin", "tag:stalwart"],
// 2) grants — Stalwart reaches the three shared backends:
{ "src": ["tag:stalwart"], "dst": ["tag:db-postgres"], "ip": ["tcp:5432"] },
{ "src": ["tag:stalwart"], "dst": ["tag:db-redis"], "ip": ["tcp:6379"] },
{ "src": ["tag:stalwart"], "dst": ["tag:garage"], "ip": ["tcp:3900"] },
// 3) grants — the edge proxy (tag:reverse-proxy) reaches the mailbox ports.
// 8080 is the JMAP/admin HTTP tier (fronted by the main L7 Caddy).
{
"src": ["tag:reverse-proxy"],
"dst": ["tag:stalwart"],
"ip": ["tcp:25", "tcp:465", "tcp:587", "tcp:143", "tcp:993", "tcp:8080"],
},
// 4) admin console (not this file): assign tag:stalwart to the same OAuth
// client federatedSocial uses, on the Devices/Core + Keys/AuthKeys scopes.
// Missing → 403 "calling actor does not have enough permissions" at boot.