* The munging is easy to detect, because it results in a
* redundant reply-to header, (with an address that already exists
* in either To or Cc). So in this case, we ignore the Reply-To
* The munging is easy to detect, because it results in a
* redundant reply-to header, (with an address that already exists
* in either To or Cc). So in this case, we ignore the Reply-To