Is there any reason that Civi would set unsubscribe and X-CiviMail-Bounce properly, but set return-path to reply-to instead? See the (modified) headers below.
We changed mail servers not too long ago, and since then our bounces are suddenly going to our reply-to address rather than our bounce address. Host says this is being done by the client (ie civi), rather than the mailserver, but the timing is odd since it worked fine prior to change in mail server.
I don't think we made other configuration changes that would account for this.
Any help in debugging this would be much appreciated.
Civi 4.2.6 Drupal 7.16 (yes we are planning to upgrade)
Delivered-To: [firstname.lastname@example.org] Received: by [mailserverip] with SMTP id xxxx; Thu, 18 Jun 2015 06:29:50 -0700 (PDT) X-Received: by [receiving server] with SMTP id yyyyy; Thu, 18 Jun 2015 06:29:50 -0700 (PDT) **Return-Path: <email@example.com>** Received: from [ourmailserver] ([our mail server ip]) by [receivingmailserver] with ESMTPS id [receiving mail servicer id] for[firstname.lastname@example.org] (version=TLSv1.2 cipher=xxxxx bits=128/128); Thu, 18 Jun 2015 06:29:50 -0700 (PDT) Received-SPF: pass (xxxxx) client-ip=xx.xx.xx.xxx; Authentication-Results: xxx; spf=pass (xxxxxxxxxxxx) smtp.mail=xxx Received: from [xx.xxx.xx.xxx] (helo=[ourwebserver]) by [ourmailserver] with esmtpa (Exim 4.72) (envelope-from <email@example.com>) id 1Z5Zt7-0003cp-JQ for firstname.lastname@example.org; Thu, 18 Jun 2015 13:29:49 +0000 Message-Id: <E1Z5Zt7-0003cp-JQ@mailserver> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="=_abd6aac4c1ae6db13534624f06413403" Reply-To: "US" <email@example.com> From: "NY-BEST" <firstname.lastname@example.org> Subject: Next Week! Conference **List-Unsubscribe: <mailto:email@example.com>** To: Admin User <firstname.lastname@example.org> Precedence: bulk **X-CiviMail-Bounce: email@example.com** Date: Thu, 18 Jun 2015 09:30:08 -0400