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-rw-r--r--Mailman/Handlers/CookHeaders.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/Mailman/Handlers/CookHeaders.py b/Mailman/Handlers/CookHeaders.py
index e36c5291..41645d6c 100644
--- a/Mailman/Handlers/CookHeaders.py
+++ b/Mailman/Handlers/CookHeaders.py
@@ -328,6 +328,12 @@ def process(mlist, msg, msgdata):
# 2047 encoded.
i18ndesc = uheader(mlist, mlist.description, 'List-Id', maxlinelen=998)
listid_h = formataddr((str(i18ndesc), listid))
+ # With some charsets (utf-8?) and some invalid chars, str(18ndesc) can
+ # be empty.
+ if str(i18ndesc):
+ listid_h = formataddr((str(i18ndesc), listid))
+ else:
+ listid_h = '<%s>' % listid
else:
# without desc we need to ensure the MUST brackets
listid_h = '<%s>' % listid