使用dkim=softfail ()但不使用phpmailer？

Question

我有一个运行邮件软件的服务器。此软件使用phpmailer。如果我通过这个软件发送电子邮件，我没有问题，我得到了SPF=PASS以及DKIM=PASS。

但是，当我尝试使用一个只使用mail()的常规PHP文件时，我收到了一封带有dkim=softfail (fail, body has been altered) header.i=@example.com错误的电子邮件。下面是具体的说明。

我在网上查了几个小时，但我找到的都是RFC规范的链接，说这个问题是由“行长度超过990字节”或“格式错误的行结尾”之类的东西引起的(这两种情况在这里都不适用，因为我使用的是chunk_split())。

是什么原因导致我的代码中的DKIM出现这个问题？有没有其他我忽略的RFC规范？

**PHP script I use:**

//build array with headers
$header = array();
$boundary = md5(uniqid(rand()));
$header[] = "MIME-Version: 1.0";
$header[] = "Content-Type: multipart/alternative; boundary = $boundary";
$header[] = "From: Me <me@example.com>";

// get html version
ob_start();
include('html.php');
$Html = ob_get_contents();
ob_end_clean();

// get TXT version
ob_start();
include('txt.php');
$Txt = ob_get_contents();
ob_end_clean();

// Build final message body
// TXT part of message
$body = "--$boundary\r\nContent-Type: text/plain; charset=UTF-8\r\nContent-Transfer-Encoding: base64\r\n";
$body .= chunk_split(base64_encode($Txt));

// HTML part of message
$body .= "--$boundary\r\nContent-Type: text/html; charset=UTF-8\r\nContent-Transfer-Encoding: base64\r\n";
$body .= chunk_split(base64_encode($Html));
$body .= "--$boundary--";

// sent email
$isMailed = mail("me@example.com","=?UTF-8?B?".base64_encode($subject)."?=",$body, implode("\n", $header));

编辑:为了帮助解决这个问题，下面是我用上面的脚本得到的一个示例电子邮件标题：

Return-Path: <apache@example.com>
Delivered-To: me@example.com
Received: from localhost (mx1.example.com [127.0.0.1])
    by mx1.example.com (Postfix) with ESMTP id 4E50FBF31F
    for <me@example.com>; Tue, 16 Dec 2014 16:54:43 +0100 (CET)
X-Virus-Scanned: Debian amavisd-new at mx1.example.com
Authentication-Results: mx1.example.com (amavisd-new);
    dkim=softfail (fail, body has been altered) header.i=@example.com
Received: from mx1.example.com ([127.0.0.1])
    by localhost (mx1.example.com [127.0.0.1]) (amavisd-new, port 10024)
    with ESMTP id o8MXZhIlf1tF for <me@example.com>;
    Tue, 16 Dec 2014 16:54:42 +0100 (CET)
Received: from example.com (example.com [123.23.45.67])
    by mx1.example.com (Postfix) with SMTP id 92A21AF218
    for <me@example.com>; Tue, 16 Dec 2014 16:54:41 +0100 (CET)
Received: from localhost (mailsvr [127.0.0.1])
    by example.com (Postfix) with ESMTP id 895B51018227
    for <me@example.com>; Tue, 16 Dec 2014 16:56:23 +0100 (CET)
X-Virus-Scanned: amavisd-new at example.com
Received: from example.com ([127.0.0.1])
    by localhost (mailsvr.example.com [127.0.0.1]) (amavisd-new, port 10024)
    with LMTP id gm+3YJEGgEc7 for <me@example.com>;
    Tue, 16 Dec 2014 16:56:22 +0100 (CET)
Received: by example.com (Postfix, from userid 47)
    id A973B317802E; Tue, 16 Dec 2014 16:56:20 +0100 (CET)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=example.com;
    s=default; t=1418745380;
    bh=wL3reSbwXm4SPw5A8n9RooRKg+7j0rkM5+iBCFG51XI=;
    h=To:Subject:MIME-Version:Content-Type:From:Message-Id:Date;
    b=BALRnjP3rx8LcYUxvrLBSASiZyFgA5ckTvGHoKF4V+o8JOLtLTmpmPQS91ohHIwOq
     UFRhv6qJl9ObvFWl0c6QyVthGjCz2+2vB6RkMXQxzJgwxPIe6X51iIEDxA4Y3EYs+x
     0DxmjMTt5tNKNBrjvEtZiEolkfbua8cearxA/Q3M=
To: me@example.com
Subject: =?UTF-8?B?dGVzdA==?=
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary = 47eacbbcbff31a13d0894e4f9ac0450b
From: Me <me@example.com>
Message-Id: <20141216155620.A972B387802D@example.com>
Date: Tue, 16 Dec 2014 16:56:20 +0100 (CET)

--47eacbbcbff31a13d0894e4f9ac0450b
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: base64

dGVzdA==
--47eacbbcbff31a13d0894e4f9ac0450b
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: base64

PGh0bWw+PGhlYWQ+PC9oZWFkPg0KPGJvZHk+DQo8cD50ZXN0PC9wPg0KPC9ib2R5Pg0KPC9odG1s
Pg==
--47eacbbcbff31a13d0894e4f9ac0450b--

Answer 1

您的服务器是什么？您使用的是什么类型的邮件服务器？

任何仍在运行dkim-milter的人都可以在几分钟内切换到OpenDKIM -保留您现有的密钥、DNS设置等。

例如，如果您运行的是CentOS 6，如果您启用了EPEL，则只需执行"yum install opendkim"，它将使用最常见的默认配置安装OpenDKIM的最新发布版本，包括一组用于您的服务器的默认密钥。opendkim包在Fedora 14-17和EL 5-6的稳定repos中可用。

故障排除的第二种方法:如果您使用\n表示换行符(例如标题行的末尾)。但你必须使用\r\n这解决了我的问题！