We have Exchange Server 2010 setup and we can send email as another user.
However, we have an undesired side effect:
Authenticated as firstname.lastname@example.org, email@example.com can send an email to anyone as firstname.lastname@example.org, but the sent message ends up in bill's inbox, regardless of who the message was sent to.
Anyway we can disable this "feature" and not have the sent messages end up in the other user's inbox?
Here is a sample header:
Received: from localhost (xx.xx.xx.xx) by mail.domain.com (xx.xx.xx.xx) with Microsoft SMTP Server (TLS) id 14.1.289.1; Tue, 28 Jun 2011 12:37:53 -0700 From: Bill Gates <email@example.com> To: Steve Jobs <firstname.lastname@example.org> Reply-To: Bill Gates <email@example.com> Subject: Test Subject Date: Tue, 28 Jun 2011 12:37:52 -0700 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-ID: <ff5f075d-e615-4e07-8527-395f05e006f2@EVAEXCH01.domain.local> Return-Path: firstname.lastname@example.org X-MS-Exchange-Organization-AuthSource: evaexch01.domain.local X-MS-Exchange-Organization-AuthAs: Internal X-MS-Exchange-Organization-AuthMechanism: 06 X-Originating-IP: [xx.xx.xx.xx] X-Auto-Response-Suppress: DR, OOF, AutoReply MIME-Version: 1.0