diff --git a/src/core.py b/src/core.py
index c2624584..a89e7b25 100644
--- a/src/core.py
+++ b/src/core.py
@@ -658,12 +658,17 @@ class Core(object):
         self.add_tab(form_tab, True)
 
     def on_got_offline(self, presence):
+        """
+        A JID got offline
+        """
         jid = presence['from']
         logger.log_roster_change(jid.bare, 'got offline')
         # If a resource got offline, display the message in the conversation with this
         # precise resource.
         if jid.resource:
             self.add_information_message_to_conversation_tab(jid.full, '\x195}%s is \x191}offline' % (jid.full))
+        if jid.server in roster.blacklist:
+            return
         self.add_information_message_to_conversation_tab(jid.bare, '\x195}%s is \x191}offline' % (jid.bare))
         self.information('\x193}%s \x195}is \x191}offline' % (jid.bare), 'Roster')
         if isinstance(self.current_tab(), tabs.RosterInfoTab):
diff --git a/src/roster.py b/src/roster.py
index 7f93c4b2..e1251024 100644
--- a/src/roster.py
+++ b/src/roster.py
@@ -19,6 +19,10 @@ from sleekxmpp.xmlstream.stanzabase import JID
 from sleekxmpp.exceptions import IqError
 
 class Roster(object):
+
+    # MUC domains to blacklist from the contacts roster
+    blacklist = set()
+
     def __init__(self):
         """
         node: the RosterSingle from SleekXMPP
@@ -103,7 +107,7 @@ class Roster(object):
 
     def jids(self):
         """List of the contact JIDS"""
-        return [key for key in self.__node.keys() if key not in self.__mucs and key != self.jid]
+        return [key for key in self.__node.keys() if JID(key).server not in self.blacklist and key != self.jid]
 
     def get_contacts(self):
         """
diff --git a/src/tabs.py b/src/tabs.py
index f798df69..be8085e8 100644
--- a/src/tabs.py
+++ b/src/tabs.py
@@ -1171,6 +1171,7 @@ class MucTab(ChatTab):
                 self.core.events.trigger('muc_join', presence, self)
                 if from_nick == self.own_nick:
                     self.joined = True
+                    roster.blacklist.add(JID(from_room).server)
                     if self.get_name() in self.core.initial_joins:
                         self.core.initial_joins.remove(self.get_name())
                         self._state = 'normal'