Fix bounce and spam detection to exclude auth failures

Improved accuracy:
- Bounces now only count actual SMTP delivery failures (550-554 codes)
- Excludes SMTP/IMAP/FTP authentication failures from bounce count
- Spam rejected now only counts actually rejected emails
- Excludes emails delivered to spam folder (those are successful deliveries)
- Updated display sections to match new filtering logic

This fixes the misleading "334 bounced" count that was actually
showing authentication failures, not email delivery problems.

modules/email/email-diagnostics.sh

@@ -159,17 +159,19 @@ delivered=$(grep -ci "=> .*$search_pattern\|delivered.*$search_pattern" "$TEMP_M
 delivered=$(echo "$delivered" | head -1 | tr -d '\n\r')
 sent=$(grep -ci "<=.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
 sent=$(echo "$sent" | head -1 | tr -d '\n\r')
-bounced=$(grep -ci "bounce.*$search_pattern\|failed.*$search_pattern\|550.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
+# Only count actual email bounces, not auth failures
+bounced=$(grep -i "$search_pattern" "$TEMP_MATCHES" | grep -v "authenticator failed\|Authentication failed" | grep -ci "550\|551\|552\|553\|554\|bounced\|Mail delivery failed" 2>/dev/null || echo 0)
 bounced=$(echo "$bounced" | head -1 | tr -d '\n\r')
 deferred=$(grep -ci "deferred.*$search_pattern\|retry.*$search_pattern\|temporarily rejected" "$TEMP_MATCHES" 2>/dev/null || echo 0)
 deferred=$(echo "$deferred" | head -1 | tr -d '\n\r')
-rejected=$(grep -ci "rejected.*$search_pattern\|denied.*$search_pattern\|blocked.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
+rejected=$(grep -i "$search_pattern" "$TEMP_MATCHES" | grep -v "authenticator failed\|Authentication failed" | grep -ci "rejected RCPT\|rejected.*relay.*denied\|rejected.*spam" 2>/dev/null || echo 0)
 rejected=$(echo "$rejected" | head -1 | tr -d '\n\r')
 spf_fail=$(grep -ci "SPF.*fail.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
 spf_fail=$(echo "$spf_fail" | head -1 | tr -d '\n\r')
 dkim_fail=$(grep -ci "DKIM.*fail.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
 dkim_fail=$(echo "$dkim_fail" | head -1 | tr -d '\n\r')
-spam_rejected=$(grep -ci "spam.*$search_pattern\|SpamAssassin.*rejected.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
+# Only count actually rejected spam, not spam delivered to spam folder
+spam_rejected=$(grep -i "$search_pattern" "$TEMP_MATCHES" | grep -i "spam" | grep -ci "rejected\|blocked\|denied" 2>/dev/null || echo 0)
 spam_rejected=$(echo "$spam_rejected" | head -1 | tr -d '\n\r')
 greylist=$(grep -ci "greylist.*$search_pattern\|greylisted.*$search_pattern" "$TEMP_MATCHES" 2>/dev/null || echo 0)
 greylist=$(echo "$greylist" | head -1 | tr -d '\n\r')
@@ -507,9 +509,9 @@ fi
 if [ "$bounced" -gt 0 ]; then
     print_header "RECENT BOUNCES/FAILURES (last 5 from past $hours hours)"
     echo ""
-    print_warning "PROOF - These emails failed recently:"
+    print_warning "PROOF - These emails failed delivery:"
     echo ""
-    grep -i "bounce.*$search_pattern\|failed.*$search_pattern\|550.*$search_pattern" "$TEMP_MATCHES" | tail -5 | while read line; do
+    grep -i "$search_pattern" "$TEMP_MATCHES" | grep -v "authenticator failed\|Authentication failed" | grep -i "550\|551\|552\|553\|554\|bounced\|Mail delivery failed" | tail -5 | while read line; do
         timestamp=$(echo "$line" | grep -oE '[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}|[A-Z][a-z]{2} [0-9]+ [0-9]{2}:[0-9]{2}:[0-9]{2}' | head -1)
         if [ -n "$timestamp" ]; then
             echo -e "  ${RED}[$timestamp]${NC} $line"
@@ -522,14 +524,14 @@ if [ "$bounced" -gt 0 ]; then
     # Extract bounce reasons
     print_header "COMMON BOUNCE REASONS"
     echo ""
-    grep -i "bounce\|550\|fail" "$TEMP_MATCHES" | grep -oE "550 .*|User unknown|Mailbox.*full|Relay.*denied|blocked" | sort | uniq -c | sort -rn | head -5
+    grep -i "$search_pattern" "$TEMP_MATCHES" | grep -v "authenticator failed\|Authentication failed" | grep -i "550\|551\|bounced" | grep -oE "550 [^:]*|551 [^:]*|User unknown|Mailbox.*full|Relay.*denied|No such user" | sort | uniq -c | sort -rn | head -5
     echo ""
 fi
 
 if [ "$rejected" -gt 0 ]; then
     print_header "RECENT REJECTIONS (last 5)"
     echo ""
-    grep -i "rejected.*$search_pattern\|denied.*$search_pattern\|blocked.*$search_pattern" "$TEMP_MATCHES" | tail -5 | while read line; do
+    grep -i "$search_pattern" "$TEMP_MATCHES" | grep -v "authenticator failed\|Authentication failed" | grep -i "rejected RCPT\|rejected.*relay.*denied\|rejected.*spam" | tail -5 | while read line; do
         echo "  $line"
     done
     echo ""
@@ -538,7 +540,9 @@ fi
 if [ "$spam_rejected" -gt 0 ]; then
     print_header "RECENT SPAM REJECTIONS (last 5)"
     echo ""
-    grep -i "spam.*$search_pattern\|SpamAssassin.*rejected" "$TEMP_MATCHES" | tail -5 | while read line; do
+    print_info "Emails rejected as spam (not delivered):"
+    echo ""
+    grep -i "$search_pattern" "$TEMP_MATCHES" | grep -i "spam" | grep -i "rejected\|blocked\|denied" | tail -5 | while read line; do
         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)
         if [ -n "$timestamp" ]; then
             echo -e "  ${RED}[$timestamp]${NC} $line"