1 files changed, 13 insertions, 1 deletions

diff --git a/src/mailman/mta/postfix.py b/src/mailman/mta/postfix.py
index 171e0737b..14f19635a 100644
--- a/src/mailman/mta/postfix.py
+++ b/src/mailman/mta/postfix.py
@@ -45,6 +45,16 @@ ALIASTMPL = '{0:{2}}lmtp:[{1.mta.lmtp_host}]:{1.mta.lmtp_port}'
 
 
 
+class _FakeList:
+    """Duck-typed list for the `IMailTransportAgentAliases` interface."""
+
+    def __init__(self, list_name, mail_host):
+        self.list_name = list_name
+        self.mail_host = mail_host
+        self.posting_address = '{0}@{1}'.format(list_name, mail_host)
+
+
+
 class LMTP:
     """Connect Mailman to Postfix via LMTP."""
 
@@ -102,8 +112,10 @@ class LMTP:
         """Do the actual file writes for list creation."""
         # Sort all existing mailing list names first by domain, then by local
         # part.  For postfix we need a dummy entry for the domain.
+        list_manager = getUtility(IListManager)
         by_domain = {}
-        for mlist in getUtility(IListManager).mailing_lists:
+        for list_name, mail_host in list_manager.name_components:
+            mlist = _FakeList(list_name, mail_host)
             by_domain.setdefault(mlist.mail_host, []).append(mlist)
         print >> fp, """\
 # AUTOMATICALLY GENERATED BY MAILMAN ON {0}