messages: Fix applying custom headers

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/backend/messages.py b/src/backend/messages.py
index be1c6da792f265be23c914635c4705c71101972e..30c90c27c4a97ff2377ded4b3a6b58c5c466fa54 100644 (file)
--- a/src/backend/messages.py
+++ b/src/backend/messages.py
@@ -78,7 +78,7 @@ class Messages(misc.Object):
                        message.add_header("Message-Id", self.make_msgid())
 
                # Add any headers
-               for k, v in headers:
+               for k, v in headers.items():
                        try:
                                message.replace_header(k, v)
                        except KeyError: