61 lines
1.6 KiB
Bash
61 lines
1.6 KiB
Bash
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#!/bin/bash
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# postfix-delay-notify.sh
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# Custom delayed mail notifier for Postfix
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# Configuration
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DELAY_WARNING_HOURS=4 # Match delay_warning_time in main.cf
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TEMPLATE_FILE="/etc/postfix/delay_template.txt"
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LOCK_FILE="/tmp/postfix-delay-notify.lock"
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LOG_FILE="/var/log/postfix-delay-notify.log"
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# Create lock file or exit if already running
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exec 9>"$LOCK_FILE" || exit 1
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flock -n 9 || exit 1
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# Function to log messages
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log() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"
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}
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# Check template file exists
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[[ -f "$TEMPLATE_FILE" ]] || {
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log "Error: Template file $TEMPLATE_FILE not found"
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exit 1
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}
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# Process mail queue
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postqueue -p | awk '
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BEGIN { OFS="|"; FS="[ *]" }
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/^[A-F0-9]{10}\!/ {
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qid=$1
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sender=$(NF-1)
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recipient=$NF
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time=$3" "$4
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print qid, sender, recipient, time
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}' | while IFS='|' read -r qid sender recipient queue_time; do
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# Calculate time in queue (hours)
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queue_seconds=$(( $(date +%s) - $(date -d "$queue_time" +%s) ))
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queue_hours=$(( queue_seconds / 3600 ))
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if [[ $queue_hours -ge $DELAY_WARNING_HOURS ]]; then
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# Generate notification using template
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notification=$(sed -e "s/%HOSTNAME%/$(hostname)/g" \
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-e "s/%DELAY%/$queue_hours hours/g" \
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-e "s/%LIFETIME%/72 hours/g" \
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"$TEMPLATE_FILE")
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# Send notification
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echo "From: postmaster@$(hostname)
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To: $sender
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Subject: Delivery Delay Notification
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Content-Type: text/plain; charset=utf-8
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$notification" | sendmail -t -oi
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log "Sent delay notification for QID $qid to $sender"
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fi
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done
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# Cleanup
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rm -f "$LOCK_FILE"
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