经过大量搜索并检查了很多教程和问答，我没有找到答案！
我在 Debian 上使用 virtualmin。我启用了 DKIM 并使用 PHPMailer：
require("external/mail2/class.phpmailer.php");
require("external/mail2/class.smtp.php");
$mail= new PHPMailer();
$mail->IsSMTP();
$mail->SMTPAuth=true;
$mail->Host = "mail.rexobit.com";
$mail->Username= "my user name";
$mail->Password= 'my password';
$mail->AddAddress('myemail@gmail.com', '');
$mail->SetFrom('notifications@rexobit.com', 'REXOBIT Notify');
$mail->DKIM_domain = 'rexobit.com';
$mail->DKIM_selector = '4040';
$mail->Encoding = "base64";
$mail->DKIM_private = '/etc/dkim.key';
$mail->DKIM_passphrase = '';
$mail->DKIM_identity = 'notifications@rexobit.com';
$mail->Subject = 'testing smtp email';
$mail->IsHTML(true);
$mail->MsgHTML('this is a test email');
$mail->AltBody= 'email test';
if (!$mail->Send()) {
echo 'Mailer Error: '. $mail->ErrorInfo;
} else {
echo 'Message sent!';
}
gmail 上的结果：SPF：通过，IP 为 2a02:4780:8:6:2:2b... DKIM:'FAIL' with domain rexobit.com DMARC:'PASS'
当我在这样的代码上删除 DKIM 部分时：
require("external/mail2/class.phpmailer.php");
require("external/mail2/class.smtp.php");
$mail= new PHPMailer();
$mail->IsSMTP();
$mail->SMTPAuth=true;
$mail->Host = "mail.rexobit.com";
$mail->Username= "my user name";
$mail->Password= 'my password';
$mail->AddAddress('myemail@gmail.com', '');
$mail->SetFrom('notifications@rexobit.com', 'REXOBIT Notify');
$mail->Subject = 'testing smtp email';
$mail->IsHTML(true);
$mail->MsgHTML('this is a test email');
$mail->AltBody= 'email test';
if (!$mail->Send()) {
echo 'Mailer Error: '. $mail->ErrorInfo;
} else {
echo 'Message sent!';
}
DKIM彻底消失了！没有签名：gmail的结果：SPF：通过IP 2a02：4780：8：6：2：2b ... DMARC：'PASS'
我使用了 2048 和 1024 键，结果相同。我也在 virtualmin 服务器上禁用了 DKIM：没有成功。DKIM 自动创建的 DNS。但我创建了一个密钥对，添加到 dns 并在 phpmailer 中使用它，但结果相同！
谷歌完整结果：
Delivered-To: hamidvaghari@gmail.com
Received: by 2002:a9d:5a8:0:0:0:0:0 with SMTP id 37csp6792321otd;
Tue, 14 Jan 2020 23:49:08 -0800 (PST)
X-Google-Smtp-Source: APXvYqyipy6njznZ0kMNV2V+cOd1k8Bp/bf3OF92K2umRR4xYOUBOU9NvfxRiW6oMAPH5Vb26Sxo
X-Received: by 2002:a17:906:e86:: with SMTP id p6mr27208898ejf.299.1579074548335;
Tue, 14 Jan 2020 23:49:08 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1579074548; cv=none;
d=google.com; s=arc-20160816;
b=ni1Zo9tfatMw4rukiT6Kq/s08pOGgjgYU6/Q/+QlDISkUnkGYzvs7wtC4iFYZX01Nl
qHWRLUfqExqx5oJN+2g1NvOUp+UhZk9HarE6v/Xy7qjADDbiTXvNIFRBhlR6nC9t2ADq
DmLVEzmtxEjYrYxbncbt1cl4kGWlQfu3X5/wPo66Mh89p3gdMOUJWVQbRb/akaivhIK/
ZQjirZ8MAVzTdtJ1AjDesUu5F4+xLi8H1B1Nb7bLOwS81W+lWUn8EQFOYz3eOo7LFOlX
CCVciMJFompewrqRurRCVwh5b5WyGJReDCMElXoJcHIhRfW2Nt8/Uze3bWGe4Cnyz/y5
ij3w==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
h=mime-version:message-id:reply-to:from:date:dkim-signature:subject
:to;
bh=/JG3Oa95UztnpL1MJZUL9Uqkjr7talhabzwuJCduqaw=;
b=fSCo7HHsDKdSYxmlujr2tUGqbCx+08+dzrGTIEYUW/j5bABOzLjZSKP7jplZ4vzIv/
KObFrCHjn4MhydtalG1+fQLRl0TzvMcIX+qAHHLuvlwTzhL3W15vHUdfsEOoI6cJJ30D
/RQ2IL9JIvMbo2s2p2O5Fij3RnduqLc0NAywFKfxPaOaqSxQD67YsxDe2RN62z17w0dT
J5EvjLXtBy+tmo6VW9l0MQiDWKN0vxi6MEJC8s3XVjgygJz1vcM5tPpR6ZH70usG7e15
rLP8nJzP06XCzB8aWqRzIPdRHh4kGRIjpfsVvBoHy2TjKbHjSgmQ6VeanmgR6sqpQO4a
fAfA==
ARC-Authentication-Results: i=1; mx.google.com;
dkim=neutral (bad format) header.i=@rexobit.com header.s=5050;
spf=pass (google.com: domain of notifications@rexobit.com designates 2a02:4780:8:6:2:2b17:c6c2:18f5 as permitted sender) smtp.mailfrom=notifications@rexobit.com;
dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=rexobit.com
Return-Path: <notifications@rexobit.com>
Received: from vps.server.local ([2a02:4780:8:6:2:2b17:c6c2:18f5])
by mx.google.com with ESMTPS id h22si12150651ejc.261.2020.01.14.23.49.08
for <hamidvaghari@gmail.com>
(version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256);
Tue, 14 Jan 2020 23:49:08 -0800 (PST)
Received-SPF: pass (google.com: domain of notifications@rexobit.com designates 2a02:4780:8:6:2:2b17:c6c2:18f5 as permitted sender) client-ip=2a02:4780:8:6:2:2b17:c6c2:18f5;
Authentication-Results: mx.google.com;
dkim=neutral (bad format) header.i=@rexobit.com header.s=5050;
spf=pass (google.com: domain of notifications@rexobit.com designates 2a02:4780:8:6:2:2b17:c6c2:18f5 as permitted sender) smtp.mailfrom=notifications@rexobit.com;
dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=rexobit.com
Received: by vps.server.local (Postfix, from userid 1001) id F199223978; Wed, 15 Jan 2020 07:49:07 +0000 (UTC)
To: hamidvaghari@gmail.com
Subject: testing smtp email
X-PHP-Originating-Script: 1001:class.phpmailer.php
X-PHPMAILER-DKIM: phpmailer.worxware.com
DKIM-Signature: v=1; a=rsa-sha1; q=dns/txt; l=340; s=5050; t=1579074547; c=relaxed/simple; h=From:To:Subject; d=rexobit.com; i=notifications@rexobit.com; z= | |Subject:=20testing=20smtp=20email; bh=R/emTcIGHSLVMGRNT6rmQdfikuw=; b=
Date: Wed, 15 Jan 2020 07:49:07 +0000
From: REXOBIT Notify <notifications@rexobit.com>
Reply-to: REXOBIT Notify <notifications@rexobit.com>
Message-ID: <933a2cee08fd835247b62fbddb5d763a@rexobit.com>
X-Priority: 3
X-Mailer: PHPMailer 5.1 (phpmailer.sourceforge.net)
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="b1_933a2cee08fd835247b62fbddb5d763a"
--b1_933a2cee08fd835247b62fbddb5d763a
Content-Type: text/plain; charset = "utf-8"
Content-Transfer-Encoding: base64
ZW1haWwgdGVzdA==
--b1_933a2cee08fd835247b62fbddb5d763a
Content-Type: text/html; charset = "utf-8"
Content-Transfer-Encoding: base64
dGhpcyBpcyBhIHRlc3QgZW1haWw=
--b1_933a2cee08fd835247b62fbddb5d763a--
有什么帮助吗？