#! /bin/bash

# shellcheck source=../bin-helper.sh
. /usr/local/bin/bin-helper.sh

HOSTNAME=${1}
RECIPIENT=${2}
SENDER=${3}

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

# 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!
if [[ -r "/var/log/mail/mail.log.1" ]]
then
  BODY=$(/usr/sbin/pflogsumm /var/log/mail/mail.log.1 --problems-first)
else
  BODY="Error: Mail log not readable or not found: /var/log/mail/mail.log.1

In case of mail inactivity since the last report, this might be considered a nuisance warning.

Yours faithfully,
The ${HOSTNAME} Mailserver"
fi

sendmail -t <<EOF
From: ${SENDER}
To: ${RECIPIENT}
Subject: Postfix Summary for ${HOSTNAME}
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset=UTF-8

${BODY}
EOF