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selfpost/deploy/caddy/docker-compose.caddy.yml
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mix 656c4d4d7f release: 1.4.0: Optional inbound relay (backup-MX) on port 25
Optional inbound relay (backup-MX / forwarder) on port 25, off by default. Mail is accepted only for domains configured in the panel and forwarded to an upstream; there are still no mailboxes. A dedicated security review of the inbound path is still open on the plan (Fable).
Added:
  - `INBOUND_RELAY_ENABLE` (default `false`): when true, Postfix listens on
  - Panel **Inbound** pages (global administrator): domains, upstream host/port
  - Optional `INBOUND_ANTISPAM_MILTER` on the inbound listener only, plus
  - Inbound rate limit (`INBOUND_RATE_LIMIT_MESSAGES_PER_IP`, default 20) and
Changed:
  - Compose publishes host port 25 even when the flag is off (nothing listens
  - Full-backup restore Resync also rebuilds inbound maps when the flag is on.

Full detail: CHANGELOG.md (1.4.0).
2026-09-22 15:24:52 +03:00

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# Alternative reverse-proxy: Caddy (spec 10.3) — the simplest option, fully
# automatic ACME with no separate certbot container. Caddy writes certificates
# as plain PEM under its own data directory, which this fragment bind-mounts
# to the host so SelfPost can read the same files.
#
# NOTE (spec 10.3 explicitly flags this): Caddy's on-disk cert path includes
# the ACME CA's name as a path segment, e.g.
# <data>/caddy/certificates/acme-v02.api.letsencrypt.org-directory/<hostname>/<hostname>.crt
# This has been stable across recent Caddy releases but is an internal
# storage detail, not a documented public API — VERIFY the exact path against
# the Caddy version you deploy (`docker compose exec caddy find /data/caddy/certificates -name '*.crt'`)
# before wiring it into the volume mount below.
#
# Merge with the base file — run this from the deploy/ directory (Compose
# resolves every relative path in both files against the directory of the
# FIRST -f file, i.e. deploy/, which is why paths below are ./caddy/...):
#
# docker compose -f docker-compose.yml -f caddy/docker-compose.caddy.yml up -d
services:
selfpost:
ports: !override
- "465:465"
- "587:587"
- "25:25"
environment:
# Caddy names certificate files after the hostname, not
# fullchain.pem/privkey.pem like certbot — override the base file's
# paths to match.
TLS_CERT_FILE: /etc/postfix/tls/<hostname>.crt
TLS_KEY_FILE: /etc/postfix/tls/<hostname>.key
volumes: !override
- ./data:/data
- .:/selfpost-deploy:ro
# Replace <hostname> with your actual mail/panel hostname, matching
# the Caddyfile below and SELFPOST_HOSTNAME.
- ./caddy/caddy-data/caddy/certificates/acme-v02.api.letsencrypt.org-directory/<hostname>:/etc/postfix/tls:ro
caddy:
image: caddy:2
restart: unless-stopped
depends_on:
- selfpost
ports:
- "80:80"
- "443:443"
volumes:
- ./caddy/Caddyfile:/etc/caddy/Caddyfile:ro
- ./caddy/caddy-data:/data
- ./caddy/caddy-config:/config