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release: 1.4.0: Optional inbound relay (backup-MX) on port 25

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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).
This commit is contained in:
mix
2026-09-22 15:24:52 +03:00
parent 0730b2090e
commit 656c4d4d7f
50 changed files with 2512 additions and 125 deletions
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build/entrypoint.sh
+7
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@@ -103,6 +103,13 @@ chmod 2750 /data/sasl
# writes sender_login_maps; Postfix owns the on-disk queue tree under queue/.
mkdir -p /data/postfix/queue
[ -e /data/postfix/sender_login_maps ] || : > /data/postfix/sender_login_maps
# Inbound relay maps (written by the panel when INBOUND_RELAY_ENABLE=true).
# Empty files keep postfix check happy if the flag is on before any domain exists.
for f in relay_domains transport relay_recipients tls_policy; do
[ -e "/data/postfix/$f" ] || : > "/data/postfix/$f"
chown panel:selfpost "/data/postfix/$f"
chmod 0640 "/data/postfix/$f"
done
chown panel:selfpost /data/postfix
chmod 2750 /data/postfix
chown panel:selfpost /data/postfix/sender_login_maps