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-rw-r--r--Mailman/Bouncers/DSN.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Mailman/Bouncers/DSN.py b/Mailman/Bouncers/DSN.py
index 8696fd8e3..4b82f6750 100644
--- a/Mailman/Bouncers/DSN.py
+++ b/Mailman/Bouncers/DSN.py
@@ -111,4 +111,4 @@ def process(msg):
headers.get('final-recipient'))
if val:
addrs.append(parseaddr(val))
- return addrs or None
+ return filter(None, addrs) or None