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-rw-r--r--Mailman/GatewayManager.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Mailman/GatewayManager.py b/Mailman/GatewayManager.py
index 77127857d..e35a0ed4e 100644
--- a/Mailman/GatewayManager.py
+++ b/Mailman/GatewayManager.py
@@ -130,7 +130,7 @@ class GatewayManager:
subj = msg.getheader('subject')
if subj:
subjpref = self.subject_prefix
- if not re.match(re.escape(subjpref), subj, re.I):
+ if not re.match('(re:? *)?' + re.escape(subjpref), subj, re.I):
msg.SetHeader('Subject', '%s%s' % (subjpref, subj))
else:
msg.SetHeader('Subject', '%s(no subject)' % prefix)