docker-mailserver/target/bin/restrict-access

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#! /bin/bash
# shellcheck source=../scripts/helpers/index.sh
source /usr/local/bin/helpers/index.sh
MODE="${1}"
USER="${3}"
function usage { echo "Usage: ${0} <add|del|list> <send|receive> [<email@domain.com>]" ; }
[[ -z ${MODE} ]] && _exit_with_error "missing parameters: <add|del|list> <send|receive> [<email@domain.com>]"
case ${2} in
send)
DATABASE="/tmp/docker-mailserver/postfix-send-access.cf"
;;
receive)
DATABASE="/tmp/docker-mailserver/postfix-receive-access.cf"
;;
*)
usage
_exit_with_error "missing parameters. Specify \"send\" or \"receive\""
;;
esac
if [[ -z ${USER} ]] && [[ ${MODE} != list ]]
then
read -r -p "User(user@domain.com): " USER
echo
[[ -z ${USER} ]] && _exit_with_error "User must not be empty"
fi
case ${MODE} in
add)
grep -qi "^$(_escape "${USER}")" "${DATABASE}" 2>/dev/null && _exit_with_error "User \"${USER}\" already denied to ${2} mails"
if [[ ! -f ${DATABASE} ]]
then
# shellcheck disable=SC2015
[[ ${DATABASE} = *"send"* ]] && \
sed -i 's|smtpd_sender_restrictions =|smtpd_sender_restrictions = check_sender_access texthash:/tmp/docker-mailserver/postfix-send-access.cf,|' /etc/postfix/main.cf \
|| sed -i 's|smtpd_recipient_restrictions =|smtpd_recipient_restrictions = check_recipient_access texthash:/tmp/docker-mailserver/postfix-receive-access.cf,|' /etc/postfix/main.cf
service postfix reload >/dev/null
fi
echo -e "${USER} \t\t REJECT" >>"${DATABASE}"
;;
del)
sed -ie "/^$(_escape "${USER}")/d" "${DATABASE}" 2>/dev/null || _exit_with_error "User \"${USER}\" not found."
;;
list)
grep "REJECT" "${DATABASE}" 2>/dev/null || echo "Everyone is allowed to ${2} mails."
;;
*)
usage
_exit_with_error "missing mode. Specify \"add\", \"del\" or \"list\""
;;
esac