Enhance email diagnostics with comprehensive tracking
Bug fixes: - Fix integer expression errors by sanitizing grep output - Separate IMAP/POP3 authentication from email delivery events - Prevent login failures from being counted as email bounces New tracking features: - Spam rejections (SpamAssassin) - Greylisting events - Emails received count - Authentication activity (successful/failed logins) - Failed login IPs extraction - Top 5 senders and recipients - Email account existence check - Mailbox size and message count - Quota information - Email forwarder detection Enhanced recommendations: - Spam rejection troubleshooting - Greylisting explanation - Account not found guidance - Failed login attempt handling
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cschantz
@@ -89,8 +89,18 @@ fi
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################################################################################
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TEMP_MATCHES="/tmp/email_diag_$$.txt"
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TEMP_AUTH="/tmp/email_auth_$$.txt"
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# Get ALL matches for this email/domain
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grep -i "$search_pattern" "$MAIL_LOG" > "$TEMP_MATCHES" 2>/dev/null
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# Separate authentication events (IMAP/POP3 logins)
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grep -E "imap-login|pop3-login|dovecot.*Login|Logged in|Disconnected" "$TEMP_MATCHES" > "$TEMP_AUTH" 2>/dev/null || true
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# Get only email delivery events (exclude auth logs)
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grep -v "imap-login\|pop3-login\|dovecot.*Login\|Logged in\|Disconnected" "$TEMP_MATCHES" > "$TEMP_MATCHES.delivery" 2>/dev/null || true
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mv "$TEMP_MATCHES.delivery" "$TEMP_MATCHES"
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if [ ! -s "$TEMP_MATCHES" ]; then
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print_error "❌ NO EMAIL ACTIVITY FOUND for $check_label"
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echo ""
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@@ -129,14 +139,33 @@ echo ""
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print_header "📊 Activity Summary"
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echo ""
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# Count different types
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delivered=$(grep -ci "=> .*$search_pattern\|delivered.*$search_pattern" "$TEMP_MATCHES" || echo 0)
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sent=$(grep -ci "<=.*$search_pattern" "$TEMP_MATCHES" || echo 0)
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bounced=$(grep -ci "bounce.*$search_pattern\|failed.*$search_pattern\|550.*$search_pattern" "$TEMP_MATCHES" || echo 0)
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deferred=$(grep -ci "deferred.*$search_pattern\|retry.*$search_pattern\|temporarily rejected" "$TEMP_MATCHES" || echo 0)
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rejected=$(grep -ci "rejected.*$search_pattern\|denied.*$search_pattern\|blocked.*$search_pattern" "$TEMP_MATCHES" || echo 0)
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spf_fail=$(grep -ci "SPF.*fail.*$search_pattern" "$TEMP_MATCHES" || echo 0)
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dkim_fail=$(grep -ci "DKIM.*fail.*$search_pattern" "$TEMP_MATCHES" || echo 0)
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# Count different types (sanitize to remove newlines)
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delivered=$(grep -ci "=> .*$search_pattern\|delivered.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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delivered=$(echo "$delivered" | head -1 | tr -d '\n\r')
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sent=$(grep -ci "<=.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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sent=$(echo "$sent" | head -1 | tr -d '\n\r')
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bounced=$(grep -ci "bounce.*$search_pattern\|failed.*$search_pattern\|550.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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bounced=$(echo "$bounced" | head -1 | tr -d '\n\r')
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deferred=$(grep -ci "deferred.*$search_pattern\|retry.*$search_pattern\|temporarily rejected" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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deferred=$(echo "$deferred" | head -1 | tr -d '\n\r')
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rejected=$(grep -ci "rejected.*$search_pattern\|denied.*$search_pattern\|blocked.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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rejected=$(echo "$rejected" | head -1 | tr -d '\n\r')
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spf_fail=$(grep -ci "SPF.*fail.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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spf_fail=$(echo "$spf_fail" | head -1 | tr -d '\n\r')
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dkim_fail=$(grep -ci "DKIM.*fail.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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dkim_fail=$(echo "$dkim_fail" | head -1 | tr -d '\n\r')
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spam_rejected=$(grep -ci "spam.*$search_pattern\|SpamAssassin.*rejected.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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spam_rejected=$(echo "$spam_rejected" | head -1 | tr -d '\n\r')
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greylist=$(grep -ci "greylist.*$search_pattern\|greylisted.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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greylist=$(echo "$greylist" | head -1 | tr -d '\n\r')
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received=$(grep -ci "=> .*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
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received=$(echo "$received" | head -1 | tr -d '\n\r')
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# Count authentication events
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auth_failed=$(grep -ci "auth failed\|Login aborted\|authentication failed" "$TEMP_AUTH" 2>/dev/null || echo 0)
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auth_failed=$(echo "$auth_failed" | head -1 | tr -d '\n\r')
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auth_success=$(grep -ci "Logged in\|Login:.*user=.*$search_pattern" "$TEMP_AUTH" 2>/dev/null || echo 0)
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auth_success=$(echo "$auth_success" | head -1 | tr -d '\n\r')
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if [ "$delivered" -gt 0 ]; then
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print_success "✅ Delivered: $delivered emails successfully delivered"
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@@ -166,7 +195,149 @@ if [ "$dkim_fail" -gt 0 ]; then
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print_warning "⚠ DKIM Failures: $dkim_fail signature failures"
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fi
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if [ "$spam_rejected" -gt 0 ]; then
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print_error "🚫 Spam Rejected: $spam_rejected emails marked as spam"
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fi
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if [ "$greylist" -gt 0 ]; then
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print_info "⏱ Greylisted: $greylist emails temporarily delayed (anti-spam measure)"
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fi
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if [ "$received" -gt 0 ]; then
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print_info "📥 Received: $received emails received TO this $check_label"
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fi
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# Show email traffic patterns
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if [ "$sent" -gt 0 ] || [ "$received" -gt 0 ]; then
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echo ""
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print_header "📊 Email Traffic Patterns"
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echo ""
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# Top recipients (who this email is sending to)
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if [ "$sent" -gt 0 ]; then
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print_info "Top 5 recipients (emails sent TO):"
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grep -i "<= .*$search_pattern" "$TEMP_MATCHES" | grep -oE "=> [^@]+@[^ ]+" | sed 's/=> //' | sort | uniq -c | sort -rn | head -5 | while read count recipient; do
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echo " $recipient - $count emails"
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done
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echo ""
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fi
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# Top senders (who is sending to this email)
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if [ "$received" -gt 0 ]; then
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print_info "Top 5 senders (emails received FROM):"
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grep -i "=> .*$search_pattern" "$TEMP_MATCHES" | grep -oE "<= [^@]+@[^ ]+" | sed 's/<= //' | sort | uniq -c | sort -rn | head -5 | while read count sender; do
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echo " $sender - $count emails"
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done
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echo ""
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fi
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fi
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# Show authentication summary
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if [ -s "$TEMP_AUTH" ]; then
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echo ""
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print_header "🔐 Authentication Activity (IMAP/POP3 Login Attempts)"
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echo ""
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if [ "$auth_success" -gt 0 ]; then
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print_success "✅ Successful Logins: $auth_success (password is correct)"
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fi
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if [ "$auth_failed" -gt 0 ]; then
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print_error "❌ Failed Logins: $auth_failed (WRONG PASSWORD or unauthorized access)"
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# Extract IPs attempting failed logins
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failed_ips=$(grep -i "auth failed\|Login aborted" "$TEMP_AUTH" | grep -oE "rip=[0-9.]+|from [0-9.]+" | sed 's/rip=//; s/from //' | sort | uniq -c | sort -rn)
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if [ -n "$failed_ips" ]; then
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echo ""
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print_warning "IPs with failed login attempts:"
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echo "$failed_ips" | while read count ip; do
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echo " $ip - $count attempts"
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done
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fi
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fi
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fi
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echo ""
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################################################################################
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# Account Status Check (for specific email addresses)
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################################################################################
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if [ "$check_type" != "2" ]; then
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print_header "📧 Email Account Status"
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echo ""
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# Extract username and domain from email
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local_part=$(echo "$target" | cut -d'@' -f1)
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domain_part=$(echo "$target" | cut -d'@' -f2)
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# Check if email account exists in various locations
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account_found=0
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# Check cPanel mail directory
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if [ -d "/home/*/mail/$domain_part/$local_part" ]; then
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maildir=$(find /home/*/mail/$domain_part/$local_part -maxdepth 0 -type d 2>/dev/null | head -1)
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if [ -n "$maildir" ]; then
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print_success "✅ Email account EXISTS on this server"
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account_found=1
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# Get disk usage
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if [ -d "$maildir" ]; then
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disk_usage=$(du -sh "$maildir" 2>/dev/null | awk '{print $1}')
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print_info "📊 Mailbox size: $disk_usage"
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# Count messages
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msg_count=$(find "$maildir" -type f -name "*:2,*" 2>/dev/null | wc -l)
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print_info "📬 Messages stored: $msg_count"
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fi
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# Check for quota file
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quota_file=$(find /home/*/mail/$domain_part/$local_part -name "maildirsize" 2>/dev/null | head -1)
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if [ -f "$quota_file" ]; then
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quota_info=$(head -1 "$quota_file" 2>/dev/null)
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print_info "💾 Quota: $quota_info"
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fi
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fi
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fi
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# Check Plesk mail directory
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if [ $account_found -eq 0 ] && [ -d "/var/qmail/mailnames/$domain_part/$local_part" ]; then
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print_success "✅ Email account EXISTS on this server (Plesk)"
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account_found=1
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maildir="/var/qmail/mailnames/$domain_part/$local_part"
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disk_usage=$(du -sh "$maildir" 2>/dev/null | awk '{print $1}')
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print_info "📊 Mailbox size: $disk_usage"
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fi
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# Check generic /var/mail
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if [ $account_found -eq 0 ] && [ -f "/var/mail/$local_part" ]; then
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print_success "✅ Email account EXISTS in /var/mail"
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account_found=1
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disk_usage=$(du -sh "/var/mail/$local_part" 2>/dev/null | awk '{print $1}')
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print_info "📊 Mailbox size: $disk_usage"
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fi
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if [ $account_found -eq 0 ]; then
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print_warning "⚠ Email account NOT FOUND on this server"
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echo ""
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echo "This could mean:"
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echo " • Account doesn't exist (typo in email address?)"
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echo " • Account is on a different mail server"
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echo " • Mail is handled by external service (Google, Office365, etc.)"
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fi
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# Check for forwarders
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if [ -f "/etc/valiases/$domain_part" ]; then
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forwarder=$(grep "^$local_part:" "/etc/valiases/$domain_part" 2>/dev/null)
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if [ -n "$forwarder" ]; then
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echo ""
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print_info "📧 Forwarder configured:"
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echo " $forwarder"
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fi
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fi
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echo ""
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fi
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################################################################################
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# Show verdict
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@@ -260,6 +431,31 @@ if [ "$rejected" -gt 0 ]; then
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echo ""
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fi
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if [ "$spam_rejected" -gt 0 ]; then
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print_header "🚫 Recent Spam Rejections (last 5)"
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echo ""
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grep -i "spam.*$search_pattern\|SpamAssassin.*rejected" "$TEMP_MATCHES" | tail -5 | while read line; do
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timestamp=$(echo "$line" | grep -oE '[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}|[A-Z][a-z]{2} [0-9]+ [0-9]{2}:[0-9]{2}:[0-9]{2}' | head -1)
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if [ -n "$timestamp" ]; then
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echo -e " ${RED}[$timestamp]${NC} $line"
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else
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echo " $line"
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fi
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done
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echo ""
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fi
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if [ "$greylist" -gt 0 ]; then
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print_header "⏱ Recent Greylisting Events (last 5)"
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echo ""
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print_info "Note: Greylisting is temporary - emails usually deliver after retry"
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echo ""
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grep -i "greylist" "$TEMP_MATCHES" | tail -5 | while read line; do
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echo " $line"
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done
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echo ""
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fi
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if [ "$spf_fail" -gt 0 ] || [ "$dkim_fail" -gt 0 ]; then
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print_header "⚠ Authentication Issues"
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echo ""
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@@ -305,6 +501,41 @@ if [ "$spf_fail" -gt 0 ]; then
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echo ""
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fi
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if [ "$spam_rejected" -gt 0 ]; then
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echo "To fix spam rejections:"
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echo " 1. Check SpamAssassin score and adjust settings"
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echo " 2. Verify email content isn't triggering spam filters"
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echo " 3. Ensure proper SPF/DKIM authentication"
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echo " 4. Check if sending domain has good reputation"
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echo ""
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fi
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if [ "$greylist" -gt 0 ] && [ "$delivered" -eq 0 ]; then
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echo "Greylisting delays:"
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echo " • This is normal anti-spam behavior"
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echo " • Emails should deliver after sender retries (5-15 minutes)"
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echo " • No action needed unless emails never arrive"
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echo ""
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fi
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if [ "$check_type" != "2" ] && [ $account_found -eq 0 ]; then
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echo "Email account not found:"
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echo " 1. Verify the email address is spelled correctly"
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echo " 2. Check if domain DNS points to this server"
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echo " 3. Create the email account if it should exist here"
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echo " 4. Check if mail is handled by external service"
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echo ""
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fi
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if [ "$auth_failed" -gt 0 ]; then
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echo "Failed login attempts detected:"
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echo " 1. Customer may be using wrong password"
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echo " 2. Could be brute-force attack attempt"
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echo " 3. Check IPs - block suspicious ones with firewall"
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echo " 4. Advise customer to change password if compromised"
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echo ""
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fi
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################################################################################
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# Save full report
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################################################################################
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@@ -316,4 +547,4 @@ print_info "Full log saved to: $REPORT_FILE"
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echo ""
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# Cleanup
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rm -f "$TEMP_MATCHES"
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rm -f "$TEMP_MATCHES" "$TEMP_AUTH"
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