#!/usr/bin/env bash
# Postfix
echo ${MYVEMAIL_DOMAIN} >/etc/mailname
postconf -e "myhostname = ${MYVEMAIL_SUBDOMAIN}.${MYVEMAIL_DOMAIN}"
postconf -e "mydomain = ${MYVEMAIL_DOMAIN}"

# resolv.conf
mkdir /var/spool/postfix/etc
cp /etc/resolv.conf /var/spool/postfix/etc/resolv.conf

# Whitelist localhost
sed -i "s/{{LOCAL_IPADDRESS}}/$(wget -q4O- ipv4.icanhazip.com)/" /etc/postfix/postscreen_access.cidr

# Configure backup mail servers
if [ ${MYVEMAIL_BACKUPMX} ]
then
    backupmx+=(${MYVEMAIL_BACKUPMX//,/ })

    postconf -e "$(postconf mynetworks)$(printf ' %s/32' ${backupmx[@]})"
    postconf -e "smtp_fallback_relay =$(printf ' [%s]:25' ${backupmx[@]})"

    # Whitelist
    for domain in ${backupmx[@]}
    do
        echo "${domain}/32    permit" >>/etc/postfix/postscreen_access.cidr
    done
fi

# Whitelist
addmx=(${MYVEMAIL_DOMAIN})
addmx+=(${MYVEMAIL_ADDMX//,/ })
for domain in ${addmx[@]}
do
    echo "${domain}    OK" | tee -a /etc/postfix/{helo_access,rbl_override} >/dev/null
done

# Virtual mailboxes
sed -e "s/{{MYVEMAIL_POSTFIXADMIN_DBNAME}}/${MYVEMAIL_POSTFIXADMIN_DBNAME}/" \
    -e "s/{{MYVEMAIL_POSTFIXADMIN_DBUSER}}/${MYVEMAIL_POSTFIXADMIN_DBUSER}/" \
    -e "s/{{MYVEMAIL_POSTFIXADMIN_DBPASS}}/${MYVEMAIL_POSTFIXADMIN_DBPASS}/" \
    -i /etc/postfix/sql/*.cf

# Permissions
setfacl -R -m u:postfix:rx /etc/postfix/sql/

# Start postfix
postfix start
postmap /etc/postfix/helo_access /etc/postfix/rbl_override /etc/postfix/smtp_header_checks /etc/postfix/header_checks /etc/postfix/body_checks /etc/postfix/postscreen_access.cidr