From 652fb72ccc4572943d54d69d7a890b01682e249c Mon Sep 17 00:00:00 2001
From: Franziska Kunsmann <hi@kunsmann.eu>
Date: Wed, 11 Nov 2020 08:35:36 +0100
Subject: [PATCH] bundles/postfix: fix metadata reactor for letsencrypt

---
 bundles/postfix/metadata.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bundles/postfix/metadata.py b/bundles/postfix/metadata.py
index a44c4b3..e381728 100644
--- a/bundles/postfix/metadata.py
+++ b/bundles/postfix/metadata.py
@@ -73,7 +73,7 @@ def letsencrypt(metadata):
 
     if myhostname and myhostname != metadata.get('hostname'):
         result['domains'] = {
-            myhostname: {},
+            myhostname: set(),
         }
 
     return {