diff --git a/lib/nntp/tiny/session.py b/lib/nntp/tiny/session.py
index b1ea681..1b35429 100644
--- a/lib/nntp/tiny/session.py
+++ b/lib/nntp/tiny/session.py
@@ -233,7 +233,7 @@ class Session():
             'min':   row[1],
             'max':   row[2],
             'name':  newsgroup.name,
-            'perms': 'n'
+            'perms': 'y' if newsgroup.active else 'n'
         }
 
     def _cmd_listgroup(self, *args):
@@ -697,28 +697,30 @@ class Session():
 
     RE_NEWSGROUPS_SPLIT = re.compile(r'\s*,\s*')
 
-    def _save_message(self, message: Message):
+    def _save_message(self, message: Message, success: ResponseCode):
         value = message.header('Newsgroups')
 
         if value is None or value == '':
-            return False
+            return ResponseCode.NNTP_POST_FAILED
 
         names      = map(lambda s: s.lower(), self.RE_NEWSGROUPS_SPLIT.split(value))
         newsgroups = list()
 
         for name in names:
-            if name not in self.server.newsgroups:
-                return False
+            newsgroup = self.server.newsgroups.get(name)
+
+            if newsgroup is None or not newsgroup.active:
+                return ResponseCode.NNTP_POST_PROHIBITED
 
             newsgroups.append(self.server.newsgroups[name])
 
         if len(newsgroups) == 0:
-            return False
+            return ResponseCode.NNTP_POST_FAILED
 
         message.message_id_assign()
 
         if not message.validate():
-            return False
+            return ResponseCode.NNTP_POST_FAILED
 
         self.db.add(message)
 
@@ -733,7 +735,7 @@ class Session():
 
         self.db.commit()
 
-        return True
+        return success
 
     def _post_impl(self, message_id=None):
         if self.perms is None or not self.perms & UserPermission.POST:
@@ -777,10 +779,9 @@ class Session():
             if stripped == '.':
                 message.finish()
 
-                if self._save_message(message):
-                    return self.respond(code_received)
-                else:
-                    return self.respond(ResponseCode.NNTP_POST_FAILED)
+                code = self._save_message(message, code_received)
+
+                return self.respond(code)
             elif stripped == '..':
                 line = line[1:]