Must I change the name of my computer to change the name that Outlook relays, or is there a setting that Outlook uses that is initially the computer name but can be set by a (non-programmer) user, e.g. registry setting?
Below is the header of an email I sent to another email address on my domain (example.com). I received it since all emails for my domain get routed to my email account.
It happens not only with my domain though. I sent the same email to Gmail, took a look at the header, and the same identifying computer name appeared in that header also.
Return-Path: <firstname.lastname@example.org> Delivered-To: email@example.com Received: from mail.emailserver.com by mail.emailserver.com with LMTP id mARWCHyv/FpHgAAAiOHS9w for <firstname.lastname@example.org>; Wed, 16 May 2018 18:23:56 -0400 Return-path: <email@example.com> Envelope-to: firstname.lastname@example.org Delivery-date: Wed, 16 May 2018 18:23:56 -0400 Received: from [256.256.256.256] (port=37178 helo=NameOfMyComputer) by mail.emailserver.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from <email@example.com>) id 1fJ4pv-0008XV-IV for firstname.lastname@example.org; Wed, 16 May 2018 18:23:56 -0400 From: "Sender" <email@example.com> To: <firstname.lastname@example.org> Subject: Somethinginteresting Date: Wed, 16 May 2018 15:23:55 -0700 Message-ID: <email@example.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00E7_01D3ED29.E91DE950" X-Mailer: Microsoft Outlook 16.0 Thread-Index: AdPtZJL7oGrugVdcQnC0jxSqvozmog== Content-Language: en-us