docker-mailserver/target/bin/restrict-access

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