Add bash/dovecot/validate.cpanel.MD

bash/dovecot/validate.cpanel.MD

@@ -0,0 +1,26 @@
+```bash
+#!/bin/bash
+
+# Ensure we're using Bash
+if [ -z "$BASH_VERSION" ]; then
+    echo "This script must be run with Bash."
+    exit 1
+fi
+
+
+tail -F /var/log/dovecot.log | while read -r line; do
+    if echo "$line" | grep -q "Login: user=<[^@]\+@[^>]\+>"; then
+        domain=$(echo "$line" | sed -n 's/.*Login: user=<[^@]\+@\([^>]\+\)>.*/\1/p')
+        
+        if [ -n "$domain" ]; then
+            owner=$( /scripts/whoowns "$domain" )
+            
+            if [ -z "$owner" ]; then
+                echo "Domain $domain does not exist."
+            else
+                echo "Domain $domain exists and is owned by $owner."
+            fi
+        fi
+    fi
+done
+```