#!/bin/sh
set -e

# Generate main.cf from template with environment variables
envsubst < /etc/postfix/main.cf.template > /etc/postfix/main.cf

# Generate SASL password file from environment variables
envsubst < /etc/postfix/sasl_passwd.template > /etc/postfix/sasl_passwd

# Generate Postfix hash databases
postmap /etc/postfix/sasl_passwd
chmod 600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db

# Regenerate sender_access database (in case of updates)
postmap /etc/postfix/sender_access
chmod 644 /etc/postfix/sender_access /etc/postfix/sender_access.db

# Start Postfix in foreground
exec postfix start-fg