#!/bin/bash
set -eo

HOSTNAME=$1
RECIPIENT=$2
SENDER=$3
errex() {
  echo -e "$@" 1>&2
  exit 1
}

test -x /usr/sbin/pflogsumm || errex "Critical: /usr/sbin/pflogsumm not found"

BODY=$(gzip -cdfq $(ls -tr /var/log/mail/mail.log*) | /usr/sbin/pflogsumm --problems_first -d yesterday)

sendmail -t <<EOF
From: $SENDER
To: $RECIPIENT
Subject: Postfix summary for $HOSTNAME sent $(date '+%Y-%m-%d_%H%M%S')
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset=UTF-8

$BODY
EOF