[Mailman-Users] Problems making list anonymous

Hi All,

I'd like to insure that sender's email addresses don't appear in any headers.

I've set both anonymous_list and first_strip_reply_to to true.

Despite this, I'm seeing the following when I view headers:

X-Original-To: myaddress@mydomain.com

Received: from zapata.dreamhost.com (zapata.dreamhost.com [66.33.216.56]) by homiemail-mx17.g.dreamhost.com (Postfix) with ESMTP id 9E6524115BD16 for myaddress@mydomain.com; Sat, 28 Jun 2014 05:05:57 -0700 (PDT)

How can I prevent this?

Thanks,

Douglas