# Copy to .env next to docker-compose.yml and fill in.
# Full reference: docs/guide.md "Environment variables".

# Required — the container refuses to start without it. Hostname used both for
# the panel's TLS vhost and for Postfix's SASL realm (SASL_REALM defaults to
# this) and myhostname; must also match your PTR record. Must match the
# certificate your reverse proxy obtains. Bare FQDN only — no scheme or port.
SELFPOST_HOSTNAME=mail.example.com

# Set to true to also enable RFC 6409 submission (587/STARTTLS) alongside the
# primary 465/smtps listener.
SUBMISSION_ENABLE=false

# Level-1 backstop rate limit (anvil) — see docs/guide.md "Rate limiting".
RATE_LIMIT_MESSAGES_PER_IP=100
RATE_LIMIT_WINDOW_SECONDS=3600

# Days of send-log history kept before the background sweep deletes rows.
SEND_LOG_RETENTION_DAYS=90

# Sliding idle timeout for the panel login session, in days. No absolute cap:
# an admin who keeps coming back stays signed in indefinitely. Polling by the
# monitoring screens does not count as activity, only navigation/actions do.
PANEL_SESSION_IDLE_DAYS=7

# Comma-separated resolvers the panel's deliverability checks (PTR, SPF, DKIM,
# DMARC) query directly. They deliberately skip this host's own resolver: with
# systemd-resolved the reverse lookup of the server's IP answers with the local
# hostname instead of the PTR record published in public DNS, which made the
# panel report a correct PTR as wrong. Leave unset for the public defaults
# (1.1.1.1, 8.8.8.8, 9.9.9.9); set it if outbound port 53 is closed or you run
# your own recursor, e.g. SELFPOST_DNS_RESOLVERS=10.0.0.2:53
# SELFPOST_DNS_RESOLVERS=

# Comma-separated CIDRs (bare IPs allowed) of reverse proxies allowed to
# supply X-Forwarded-For for login/setup rate-limiting. Leave unset unless
# you know the exact address of your reverse proxy — trusting the wrong
# source lets a client spoof its rate-limit key. Behind the default Apache
# host-network setup this is typically the Docker bridge gateway, e.g.
# TRUSTED_PROXY_CIDR=172.18.0.1