From a44ee22a49b98b36dae103c42ebd33f2d866933b Mon Sep 17 00:00:00 2001
From: bwarsaw
Date: Thu, 2 Sep 1999 16:39:36 +0000
Subject: PR#107 reports that Pegasus (presumably an MUA) uses
 X-Confirm-Reading-To: to get automated receipts, so we need to remove this
 header too.

---
 Mailman/Deliverer.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Mailman/Deliverer.py b/Mailman/Deliverer.py
index 9595a2e5e..1f0649076 100644
--- a/Mailman/Deliverer.py
+++ b/Mailman/Deliverer.py
@@ -145,6 +145,7 @@ class Deliverer:
         # these can be used to surreptitiously gather membership info
         del msg['return-receipt-to']
         del msg['disposition-notification-to']
+        del msg['x-confirm-reading-to']
         # get rid of duplicate fields
         del msg['sender']
         del msg['errors-to']
-- 
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