如果我从我的服务器发送电子邮件，我会得到以下标题：
Delivered-To: targetemail@gmail.com
Received: by 10.31.231.70 with SMTP id e67csp768117vkh;
Wed, 20 Sep 2017 08:12:10 -0700 (PDT)
X-Google-Smtp-Source: AOwi7QDtqlqxfaVO9FBULHwYV4HU0DKhL6jVf7jUECYVAh8qVNsp+/XIbyzNmIRjoKT0ICWy9Ome
X-Received: by 10.223.169.83 with SMTP id u77mr2134583wrc.268.1505920330877;
Wed, 20 Sep 2017 08:12:10 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1505920330; cv=none;
d=google.com; s=arc-20160816;
b=SIGNATUREHERE
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
h=message-id:content-transfer-encoding:mime-version:subject:to:from
:date:dkim-signature:arc-authentication-results;
bh=+okhXPBeWS3J3wh4Y2Ayn0yURB1edQflYGYjC0IwBQo=;
b=SIGNATUREHERE
ARC-Authentication-Results: i=1; mx.google.com;
dkim=pass header.i=@mydomain.de header.s=default header.b=sQFuh0qx;
spf=pass (google.com: domain of info@mydomain.de designates 123.456.1.1 as permitted sender) smtp.mailfrom=info@mydomain.de;
dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=mydomain.de
Return-Path: <info@mydomain.de>
Received: from mail.mydomain.de (mail.mydomain.de. [123.456.1.1])
by mx.google.com with ESMTPS id k2si1545272wmi.26.2017.09.20.08.12.10
for <targetemail@gmail.com>
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
Wed, 20 Sep 2017 08:12:10 -0700 (PDT)
Received-SPF: pass (google.com: domain of info@mydomain.de designates 123.456.1.1 as permitted sender) client-ip=123.456.1.1;
Authentication-Results: mx.google.com;
dkim=pass header.i=@mydomain.de header.s=default header.b=sQFuh0qx;
spf=pass (google.com: domain of info@mydomain.de designates 123.456.1.1 as permitted sender) smtp.mailfrom=info@mydomain.de;
dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=mydomain.de
Received: from mydomain.de (mydomain.de [IPv6:2a01:4f8:10b:1f55::2]) by mail.mydomain.de (Postfix) with ESMTPSA id 1CC703C00E6 for <targetemail@gmail.com>; Wed, 20 Sep 2017 17:12:10 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mydomain.de; s=default; t=1505920330; bh=+okhXPBeWS3J3wh4Y2Ayn0yURB1edQflYGYjC0IwBQo=; l=26446; h=From:To:Subject; b=sQFuh0qxf1rc0fFKeuhDeLoAaacLaFRyCyMw8rMJh80AZFLyLcCpVqKq1nWBBlEE0
1ii+p3Hf9HNqTvSqU66EUIZ0QtIs8GCLJI3m95DN8DpqXFvLFfiK88413zKnufODOS
aodq8Mxq53+6wG/GOmoe5jQMxG5NH1mV720xVlIw=
Authentication-Results: zeus.mydomain.de;
spf=pass (sender IP is 2a01:4f8:10b:1f55::2) smtp.mailfrom=info@mydomain.de smtp.helo=mydomain.de
Received-SPF: pass (connection is authenticated)
Date: Wed, 20 Sep 2017 17:12:10 +0200
From: info@mydomain.de
To: targetemail@gmail.com
Subject: My Subject
MIME-Version: 1.0
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Message-Id: <20170920151210.1CC703C00E6@mail.mydomain.de>
一切都很好，除了以下标题：
Authentication-Results: zeus.mydomain.de;
我如何必须更改我的服务器设置才能使该标头看起来像：
Authentication-Results: mydomain.de;
or
Authentication-Results: mail.mydomain.de;
我是否必须相应地更改主机名，目前是zeus.mydomain.de？我可以在不更改服务器主机名的情况下获得所需的标头吗？