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-rw-r--r--Mailman/Message.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/Mailman/Message.py b/Mailman/Message.py
index bb1525fb6..e8dd59539 100644
--- a/Mailman/Message.py
+++ b/Mailman/Message.py
@@ -202,7 +202,8 @@ class UserNotification(Message):
self.set_payload(text, charset)
if subject is None:
subject = '(no subject)'
- self['Subject'] = Header(subject, charset, header_name='Subject')
+ self['Subject'] = Header(subject, charset, header_name='Subject',
+ errors='replace')
self['From'] = sender
if isinstance(recip, ListType):
self['To'] = COMMASPACE.join(recip)