#!/bin/bash [ "${DEBUG}" == "yes" ] && set -x function add_config_value() { local key=${1} local value=${2} # local config_file=${3:-/etc/postfix/main.cf} [ "${key}" == "" ] && echo "ERROR: No key set !!" && exit 1 [ "${value}" == "" ] && echo "ERROR: No value set !!" && exit 1 echo "Setting configuration option ${key} with value: ${value}" postconf -e "${key} = ${value}" } # Read password and username from file to avoid unsecure env variables if [ -n "${SMTP_PASSWORD_FILE}" ]; then [ -f "${SMTP_PASSWORD_FILE}" ] && read SMTP_PASSWORD < ${SMTP_PASSWORD_FILE} || echo "SMTP_PASSWORD_FILE defined, but file not existing, skipping."; fi if [ -n "${SMTP_USERNAME_FILE}" ]; then [ -f "${SMTP_USERNAME_FILE}" ] && read SMTP_USERNAME < ${SMTP_USERNAME_FILE} || echo "SMTP_USERNAME_FILE defined, but file not existing, skipping."; fi [ -z "${SMTP_SERVER}" ] && echo "SMTP_SERVER is not set" && exit 1 [ -z "${SERVER_HOSTNAME}" ] && echo "SERVER_HOSTNAME is not set" && exit 1 [ ! -z "${SMTP_USERNAME}" -a -z "${SMTP_PASSWORD}" ] && echo "SMTP_USERNAME is set but SMTP_PASSWORD is not set" && exit 1 SMTP_PORT="${SMTP_PORT:-587}" #Get the domain from the server host name DOMAIN=`echo ${SERVER_HOSTNAME} | awk 'BEGIN{FS=OFS="."}{print $(NF-1),$NF}'` # Set needed config options add_config_value "maillog_file" "/dev/stdout" add_config_value "myhostname" ${SERVER_HOSTNAME} add_config_value "mydomain" ${DOMAIN} add_config_value "mydestination" "${DESTINATION:-localhost}" add_config_value "myorigin" '$mydomain' add_config_value "relayhost" "[${SMTP_SERVER}]:${SMTP_PORT}" add_config_value "smtp_use_tls" "yes" if [ ! -z "${SMTP_USERNAME}" ]; then add_config_value "smtp_sasl_auth_enable" "yes" add_config_value "smtp_sasl_password_maps" "lmdb:/etc/postfix/sasl_passwd" add_config_value "smtp_sasl_security_options" "noanonymous" fi add_config_value "always_add_missing_headers" "${ALWAYS_ADD_MISSING_HEADERS:-no}" #Also use "native" option to allow looking up hosts added to /etc/hosts via # docker options (issue #51) add_config_value "smtp_host_lookup" "native,dns" if [ "${SMTP_PORT}" = "465" ]; then add_config_value "smtp_tls_wrappermode" "yes" add_config_value "smtp_tls_security_level" "encrypt" fi # Create sasl_passwd file with auth credentials if [ ! -f /etc/postfix/sasl_passwd -a ! -z "${SMTP_USERNAME}" ]; then grep -q "${SMTP_SERVER}" /etc/postfix/sasl_passwd > /dev/null 2>&1 if [ $? -gt 0 ]; then echo "Adding SASL authentication configuration" echo "[${SMTP_SERVER}]:${SMTP_PORT} ${SMTP_USERNAME}:${SMTP_PASSWORD}" >> /etc/postfix/sasl_passwd postmap /etc/postfix/sasl_passwd fi fi #Set header tag if [ ! -z "${SMTP_HEADER_TAG}" ]; then postconf -e "header_checks = regexp:/etc/postfix/header_checks" echo -e "/^MIME-Version:/i PREPEND RelayTag: $SMTP_HEADER_TAG\n/^Content-Transfer-Encoding:/i PREPEND RelayTag: $SMTP_HEADER_TAG" >> /etc/postfix/header_checks echo "Setting configuration option SMTP_HEADER_TAG with value: ${SMTP_HEADER_TAG}" fi #Enable logging of subject line if [ "${LOG_SUBJECT}" == "yes" ]; then postconf -e "header_checks = regexp:/etc/postfix/header_checks" echo -e "/^Subject:/ WARN" >> /etc/postfix/header_checks echo "Enabling logging of subject line" fi #Check for subnet restrictions nets='10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16' if [ ! -z "${SMTP_NETWORKS}" ]; then for i in $(sed 's/,/\ /g' <<<$SMTP_NETWORKS); do if grep -Eq "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/[0-9]{1,2}" <<<$i ; then nets+=", $i" else echo "$i is not in proper IPv4 subnet format. Ignoring." fi done fi add_config_value "mynetworks" "${nets}" if [ ! -z "${OVERWRITE_FROM}" ]; then echo -e "/^From:.*$/ REPLACE From: $OVERWRITE_FROM" > /etc/postfix/smtp_header_checks postmap /etc/postfix/smtp_header_checks postconf -e 'smtp_header_checks = regexp:/etc/postfix/smtp_header_checks' echo "Setting configuration option OVERWRITE_FROM with value: ${OVERWRITE_FROM}" fi #Start services # If host mounting /var/spool/postfix, we need to delete old pid file before # starting services rm -f /var/spool/postfix/pid/master.pid exec /usr/sbin/postfix -c /etc/postfix start-fg