# --- Postgres --- POSTGRES_DB=lambdamail POSTGRES_USER=lambdamail POSTGRES_PASSWORD=change-me-in-local-dev # --- Redis --- REDIS_PASSWORD=change-me-in-local-dev # --- Shared secrets (local dev values — never reuse in production) --- JWT_SECRET=local-dev-jwt-secret-change-me # Encrypts DKIM private keys and provider tokens at rest. Losing it makes every # stored secret unrecoverable — back it up separately from the database. LAMBDAMAIL_MASTER_KEY=local-dev-master-key-32-bytes-min # --- Host identity --- PRIMARY_MAIL_HOST=mail.localhost MAIL_DOMAIN=localhost PUBLIC_IPV4=127.0.0.1 PUBLIC_IPV6= # --- DNS automation (Cloudflare) --- # The token needs Zone.DNS:Edit plus Zone.Zone:Read on the zone. Leave it empty # to disable reconciliation; the service then logs that DNS sync is off. CLOUDFLARE_API_TOKEN= DNS_SYNC_INTERVAL_SECONDS=21600 # --- TLS --- # traefik: read the certificate Traefik manages (default, DANE not possible). # acme: obtain the certificate ourselves via DNS-01. Required for DANE, # because only this mode can reuse a pre-generated key. TLS_MODE=traefik # Used only when TLS_MODE=acme. Leave ACME_DIRECTORY_URL empty for Let's # Encrypt production; point it at the staging directory while testing, since # production rate limits can lock a domain out for a week. ACME_EMAIL= ACME_DIRECTORY_URL= COOLIFY_PROXY_DIR=./local/acme TRAEFIK_ACME_FILENAME=acme.json CERT_POLL_INTERVAL_SECONDS=60 # Static certificate files, used when no ACME store is available (local dev). PROTOCOLS_CERT_PATH=/etc/lambdamail/certs/cert.pem PROTOCOLS_KEY_PATH=/etc/lambdamail/certs/key.pem PROTOCOLS_SPOOL_DIR=/var/lambdamail/spool # --- Transport security policy --- # Start at "testing": senders honour the policy but do not hard-fail on it. # Promote to "enforce" only once TLS-RPT reports come back clean. MTA_STS_MODE=testing OUTBOUND_MTA_STS_ENABLED=true # DANE stays off unless TLS_MODE=acme. Under Traefik-managed certificates the # key changes at every renewal and the published TLSA record stops matching, # which permanently rejects mail at every validating MTA. OUTBOUND_DANE_ENABLED=false DNSSEC_RESOLVER=1.1.1.1:53 MAX_MESSAGE_BYTES=52428800 # ARC seals accepted messages so a downstream receiver can still tell that the # mail authenticated at the first hop. Only worth enabling on a host that # forwards mail onward. ARC_SEAL_ENABLED=false # --- Smarthost (for hosts where outbound port 25 is blocked) --- # Setting RELAY_HOST routes all delivery through the relay and adds it to the # published SPF record, without which every relayed message fails SPF. RELAY_HOST= RELAY_PORT=587 RELAY_USER= RELAY_PASS= # --- Webmail --- WEBMAIL_HOST=localhost:3000 ADMIN_HOST=