#!/bin/sh

PERCENT=$1
USER=$2
DOMAIN=$(echo "$2" | awk -F@ '{print $2}')

cat << EOF | /usr/lib/dovecot/dovecot-lda -d "$USER" -o "plugin/quota=maildir:User quota:noenforcing"
From: postmaster@$DOMAIN
Subject: Quota warning - $PERCENT% reached

Your mailbox can only store a limited amount of emails.
Currently it is $PERCENT% full. If you reach 100% then
new emails cannot be stored. Thanks for your understanding.
EOF