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-rw-r--r--Mailman/Bouncers/GroupWise.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Mailman/Bouncers/GroupWise.py b/Mailman/Bouncers/GroupWise.py
index 76d506c6b..d02babb81 100644
--- a/Mailman/Bouncers/GroupWise.py
+++ b/Mailman/Bouncers/GroupWise.py
@@ -40,7 +40,7 @@ def find_textplain(msg):
def process(msg):
- if msg.gettype() <> 'multipart/mixed':
+ if msg.gettype() <> 'multipart/mixed' or not msg['x-mailer']:
return None
addrs = {}
# find the first text/plain part in the message