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Anthony Ettinger
cb09300357
Members get a real <name>@mail.profullstack.com mailbox, served by a
co-located Mailu (Postfix+Dovecot+Roundcube+rspamd) Docker stack. Coexists
with the host Caddy: Mailu owns the mail ports; Caddy fronts the loopback
webmail and supplies the TLS cert (TLS_FLAVOR=mail), the same cert-copy
pattern as the Ergo/IRC and NNTP services.
- deploy/mailu/: docker-compose.yml, mailu.env.example, refresh-certs.sh
(copy Caddy's mail cert into Mailu on renewal), provision-mailbox.sh
(member mailbox + Dovecot gateway master user), README.
- setup.sh: MAIL flag + mail.${DOMAIN#*.} Caddy site + §9e (cert timer,
mail-port firewall, conditional compose bring-up, AGENTBBS_MAIL_* env).
- docs/mail.md: architecture, DNS (MX/SPF/DKIM/DMARC/PTR), gateway
master-user setup, env, provisioning, webmail-only policy.
Apex profullstack.com stays corporate; member mail is only on mail.*.
Infra is inspection-verified (bash -n, YAML lint); deploy pending.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
1.7 KiB
1.7 KiB
deploy/mailu — self-hosted mail for mail.profullstack.com
Mailu (Postfix + Dovecot + Roundcube + rspamd) as a Docker Compose stack,
fronted by the host Caddy. Full setup, DNS, and architecture: docs/mail.md.
Files
| File | Purpose |
|---|---|
docker-compose.yml |
the Mailu services (mail ports on host, HTTP on loopback) |
mailu.env.example |
config template → copy to mailu.env and fill secrets |
refresh-certs.sh |
copy Caddy's mail.$DOMAIN cert into Mailu, reload (timer) |
provision-mailbox.sh |
create a member mailbox / the gateway master user |
mailu.env, certs/, and data/ are gitignored (secrets + state).
Gateway master user
The agentbbs gateway opens any member's mailbox over IMAP with a single secret,
using Dovecot's master user feature (login <name>*<master>). Enable it with
a Dovecot override so Mailu accepts the * separator:
data/overrides/dovecot/auth-master.conf:
auth_master_user_separator = *
passdb {
driver = static
args = nopassword=y
master = yes
result_success = continue
}
Then create the master account and point agentbbs at it:
./provision-mailbox.sh --master "$(openssl rand -hex 16)"
# AGENTBBS_MAIL_MASTER_USER=gateway, AGENTBBS_MAIL_MASTER_PASS=<that secret>
The exact master-passdb wiring varies by Mailu version; verify against your pinned image before relying on it in production. SMTP submission from the gateway uses the trusted local relay (
127.0.0.1:25), not the master user.
Ops
docker compose up -d # start
docker compose logs -f smtp # tail Postfix
docker compose exec admin flask mailu config-export # DKIM keys, etc.
docker compose down # stop