docker-mailserver/target/bin/postfix-summary

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#!/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"