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#!/usr/bin/env bash
set -e
KEY_FILE=/etc/opendkim/keys/mail.private
# Wait for DKIM key (mounted read-only from host)
for i in $(seq 1 30); do
[[ -f "$KEY_FILE" ]] && break
echo "Waiting for DKIM key at $KEY_FILE ... (run mail/install.sh on host)"
sleep 2
done
if [[ ! -f "$KEY_FILE" ]]; then
echo "ERROR: DKIM key not found at $KEY_FILE" >&2
exit 1
fi
# Docker の embedded DNS (127.0.0.11) は MX クエリを解決できないことがあるため
# 外部 DNS に差し替える（コンテナ内の名前解決は不要なので問題なし）
sed -i 's/nameserver 127.0.0.11/nameserver 8.8.8.8/' /etc/resolv.conf
echo 'nameserver 1.1.1.1' >> /etc/resolv.conf
# Start rsyslog for Postfix logging
rsyslogd
# Start OpenDKIM (runs as root per opendkim.conf UserID)
opendkim -x /etc/opendkim.conf
sleep 2
# Start Postfix
postfix start
# Keep container alive, forward mail log to stdout
touch /var/log/mail.log
exec tail -f /var/log/mail.log
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