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-rwxr-xr-xMailman/Defaults.py.in7
1 files changed, 7 insertions, 0 deletions
diff --git a/Mailman/Defaults.py.in b/Mailman/Defaults.py.in
index 594674ca..b45abf7b 100755
--- a/Mailman/Defaults.py.in
+++ b/Mailman/Defaults.py.in
@@ -1443,6 +1443,13 @@ OWNERS_CAN_PRESERVE_FILTERED_MESSAGES = Yes
# Check for administrivia in messages sent to the main list?
DEFAULT_ADMINISTRIVIA = Yes
+# The process which avoids sending a list copy of a message to a member who
+# is also directly addressed in To: or Cc: can drop the address from Cc: to
+# avoid growing a long Cc: list in long threads. This can be undesirable as
+# it can break DKIM signatures and possibly cause confusion. To avoid changes
+# to Cc: headers, set the list's drop_cc to No.
+DEFAULT_DROP_CC = Yes
+
#####