#!/bin/bash

HOSTNAME=$1
RECIPIENT=$2

errex() {
  echo -e "$@" 1>&2
  exit 1
}

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

BODY="Subject: Postfix Summary for $HOSTNAME\n\n"
# The case that the mail.log.1 file isn't readable shouldn't actually be possible with logrotate not rotating empty files.. But you never know!
[ -r "/var/log/mail/mail.log.1" ] \
  && BODY="$BODY"$(/usr/sbin/pflogsumm /var/log/mail/mail.log.1 --problems-first) \
  || BODY="$BODY Error: Mail log not readable or not found: /var/log/mail/mail.log.1\n\nIn case of mail inactivity since the last report, this might be considered a nuisance warning.\n\nYours faithfully, The $HOSTNAME Mailserver"
echo -e "$BODY" | sendmail -f "mailserver-report@$HOSTNAME" "$RECIPIENT"