Log Message:
Update to 0.63. From the changelog:

* Python version 2.1 or greater is now required.  Upgrade at
  <URL:http://www.python.org/download/>

* When sending an auto response, a new configuration variable
  (AUTORESPONSE_INCLUDE_SENDER_COPY) is used to control whether a copy
  of the sender's message is included or not.  For available options,
  <URL:http://tmda.net/config-vars.html#AUTORESPONSE_INCLUDE_SENDER_COPY>

  If you are using customized templates, you should remove the last
  few lines in each template which include the sender's copy.  For
  example, in confirm_request.txt:

  --- Enclosed is a copy of your message.

  %(original_message)s

  Otherwise, you'll include two copies of the sender's message.

* When sending confirmation requests, Reply-To is now set from the
  confirm_request.txt template.  This is to allow the option to not
  include the confirmation address in a Reply-To header.

  If you use a customized confirm_request.txt, you'll need to add the
  following line to the top (header section) of your template:

  Reply-To: %(confirm_accept_address)s