diff --git a/list_imap_messages/list_imap_messages.py b/list_imap_messages/list_imap_messages.py
index 178e312..874e521 100755
--- a/list_imap_messages/list_imap_messages.py
+++ b/list_imap_messages/list_imap_messages.py
@@ -17,19 +17,20 @@ import json
 from operator import itemgetter, attrgetter
 
 class Mailbox:
-    def __init__(self, name, count):
+    def __init__(self, name, count, children):
         self.name = name
         self.count = count
+        self.children = children
     
     def __str__(self):
-        return f"{self.name} {self.count}"
+        return f"{self.name} {self.count} messages and {len(self.children)} children mailboxes"
 
     def toJSON(self):
         return json.dumps(self, default=lambda o: o.__dict__, 
             sort_keys=True, indent=4)
 
     def __repr__(self):
-        return repr((self.name, self.count))
+        return repr((self.name, self.count, self.children))
 
 class list_imap_messages:
 
@@ -51,29 +52,52 @@ class list_imap_messages:
         self._list_mailboxes()
 
     def _list_mailboxes(self):
-        self._log.debug(f"Listing mailboxes in {self.config['mailbox']}")
-        result = self.imap.list()
-        if result[0] == 'NO':
-            self._log.error(f"Error listing mailboxes in {self.config['mailbox']}: {result[1]}")
+        self._log.debug(f"Listing mailboxes in '{self.config['mailbox']}'")
+        result_list = self.imap.list()
+        if result_list[0] == 'NO':
+            self._log.error(f"Error listing mailboxes in {self.config['mailbox']}: {result_list[1]}")
             self.imap.close()
             self.imap.logout()
             sys.exit(1)
         else:
-            self._log.debug(f"Result: {result}")
+            self._log.debug(f"Result: {result_list}")
         mailboxes = list()
-        for raw_mailbox in result[1]:
+        for raw_mailbox in result_list[1]:
             self._log.debug(raw_mailbox)
             mailbox_list = raw_mailbox.decode().split(' "/" ')
             result = self._select_mailbox(mailbox_list[1])
-            mailboxes.append(
-                Mailbox(
-                    mailbox_list[1].replace('"', ''),
-                    int(result[1][0].decode())
+            self._log.debug(f"Selecting mailbox '{mailbox_list[1]}', result: {result}")
+            # result_list = self.imap.list(mailbox_list[1])[1]
+            # self._log.debug(f"Listing mailboxes in '{mailbox_list[1]}', result: {result_list}")
+            # if len(result_list) > 1:
+            #     children_mailboxes = result_list[1]
+            # else:
+            #     children_mailboxes = []
+            if b'hasnochildren' in raw_mailbox:
+                children_mailboxes = []
+            else:
+                children_mailboxes = self._get_children(mailbox_list[1], result_list[1])
+            count = int(result[1][0])
+            if (self.config['only_empty'] and count == 0 and len(children_mailboxes) == 0) or not self.config['only_empty']:
+                mailboxes.append(
+                    Mailbox(
+                        name=mailbox_list[1].replace('"', ''),
+                        count=count,
+                        children=children_mailboxes
+                        )
                     )
-                )
-        print(json.dumps(sorted(mailboxes, key=lambda mailbox: mailbox.count, reverse=True), indent=2, default=vars))
+        self._log.info(json.dumps(sorted(mailboxes, key=lambda mailbox: mailbox.count, reverse=True), indent=2, default=vars))
         return result
 
+    def _get_children(self, mailbox, mlist):
+        children = [ mailbox ]
+        for item in mlist:
+            item_string = item.decode().split(' "/" ')[1].replace('"', '')
+            if mailbox in item_string:
+                if item_string != mailbox:
+                    children.append(item_string)
+        return children
+
     def _select_mailbox(self, mailbox):
         try:
             self._log.debug(f"Selecting mailbox '{self.config['username']}@{self.config['server']}:{self.config['port']}/{mailbox}'")
@@ -163,6 +187,7 @@ class list_imap_messages:
 @click.option("--username","-u", required=True, help="User name to login.")
 @click.option("--password","-w", required=True, help="User password to login.")
 @click.option("--mailbox","-m", default='INBOX', help="Mailbox to start examination.")
+@click.option("--only-empty", "-e", is_flag=True, default=False, help='List only empty folder')
 @click_config_file.configuration_option()
 def __main__(debug_level, log_file, **kwargs):
     return list_imap_messages(debug_level, log_file, **kwargs)