Question

我一直试图让gmail呈现我发送给它的电子邮件的html内容，但它只是给了我电子邮件的完整文本。当我发送电子邮件到yahoo或我在comcast.net的电子邮件地址时，我看到html电子邮件部分没有问题。 Gmail会渲染整个内容，包括边界字符串。这是我的代码：

//  Create a boundary string. It must be unique
//  so we use the MD5 algorithm to generate a random hash.
$random_hash = md5(date('r', time()));
//  Define the headers we want passed. Note that they are separated with \r\n.
$headers = "MIME-Version: 1.0\r\n";
$headers .= "From: \"" . $replyToName . "\" <" . $replyTo . ">\r\nReply-To: " . $replyTo . "\r\n";
$headers .= "X-Mailer: PHP/" . phpversion();
//  Add boundary string and mime type specification
$headers .= "\r\nContent-Type: multipart/alternative; boundary=\"PHP-alt-" . $random_hash ."\"";
$headers .= "\r\n";
//This is the plain-text part of the e-mail. This is what the recipient will see if they can only receive text-only e-mails.
?>
--PHP-alt-<?php echo $random_hash; ?> 
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit

<?php echo $plainMsg; ?>

<?php echo $mainSite; ?>
______________________________________________________

This e-mail is intended for the eyes of the recipient only. If you are not the
intended recipient, please send an e-mail to <?php echo $replyTo; ?> to inform us of
the mistake, and please destroy any and all copies of this e-mail.

--PHP-alt-<?php echo $random_hash; ?> 
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 7bit

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="cs" lang="cs">
<head>
<title>Untitled Document</title>
</head>
<table width="100%" border="0">
<tr>
<td>
<table width="100%" border="0" bgcolor="#ADD8E6">
<tr>
<td><img src="<?php echo $mainLink; ?>/images/BF.gif" width="95" height="65"></td>
<td valign="top"><img src="<?php echo $imageLink; ?>" width="<?php echo $imageWidth; ?>" height="<?php echo $imageHeight; ?>" /></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<font face="Arial, Helvetica, sans-serif" size="2">
<?php echo $mailMsg; ?>
</font>
</td>
</tr>
<tr>
<td>&nbsp;</td>
</tr>
<tr>
<td>
<table width="100%" border="0">
<tr>
<td>
<p>
<font face="Arial, Helvetica, sans-serif" size="2">
<a href="<?php echo $mainLink; ?>"><?php echo $mainSite; ?></a>
</font>
<br />
______________________________________________________
<br />
<br />
<font face="Arial, Helvetica, sans-serif" size="1">
This e-mail is intended for the eyes of the recipient only. If you are not the intended recipient, please send an e-mail to <a href="mailto:<?php echo $replyTo; ?>"><?php echo $replyTo; ?></a> to inform us of the mistake, and please destroy any and all copies of this e-mail.
</font>
</p>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table width="100%" border="0" bgcolor="#ADD8E6">
<tr>
<td align="center">
<font size="-2">All content, images, and data &#0169; Bright Futures 2009-2014.
<br />
All rights reserved.</font>
</td>
</tr>
</table>
</td>
</tr>
</table>

--PHP-alt-<?php echo $random_hash; ?> --

当我发送此电子邮件时，我看到整个邮件未编码。它显示了消息中的边界字符串和html标记。当我在gmail中转到“Show Original”时，我得到以下内容：

To: gsg1175@gmail.com,g.greenwell@comcast.net
Subject: Test E-mail
MIME-Version: 1.0
From: "Gregory Greenwell" <admin@yellowcas.com>
Reply-To: admin@yellowcas.com
CC: looking4unabq@yahoo.com
Content-Type: multipart/alternative; boundary="PHP-alt-8d0c53f7f76522e3a03197894d7e89fe"
Message-Id: <E1WG33R-001P1W-8P@p3plcpnl0157.prod.phx3.secureserver.net>
Date: Wed, 19 Feb 2014 02:02:57 -0700

--PHP-alt-8d0c53f7f76522e3a03197894d7e89fe 
Content-Type: text/plain; charset="utf-8" 
Content-Transfer-Encoding: 7bit 

We will keep doing this until we get it right!

Why won't this work?

WWW.YELLOWCAS.COM
______________________________________________________

This e-mail is intended for the eyes of the recipient only. If you are not the intended recipient, please send an e-mail to admin@yellowcas.com to inform us of the mistake, and please destroy any and all copies of this e-mail.

--PHP-alt-8d0c53f7f76522e3a03197894d7e89fe 
Content-Type: text/html; charset="utf-8" 
Content-Transfer-Encoding: 7bit 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="cs" lang="cs">
<head>
<title>Untitled Document</title>
</head>
<table width="100%" border="0">
<tr>
<td>
<table width="100%" border="0" bgcolor="#ADD8E6">
<tr>
<td><img src="https://www.yellowcas.com/images/BF.gif" width="95" height="65"></td>
<td valign="top"><img src="https://www.yellowcas.com/images/brightfutures70.gif" width="520" height="60" /></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<font face="Arial, Helvetica, sans-serif" size="2">
We will keep doing this <b>until we get it right!</b>

Why won't this work?
</font>
</td>
</tr>
<tr>
<td>&nbsp;</td>
</tr>
<tr>
<td>
<table width="100%" border="0">
<tr>
<td>
<p>
<font face="Arial, Helvetica, sans-serif" size="2">
<a href="https://www.yellowcas.com">WWW.YELLOWCAS.COM</a>
</font>
<br />
______________________________________________________
<br />
<br />
<font face="Arial, Helvetica, sans-serif" size="1">
This e-mail is intended for the eyes of the recipient only. If you are not the intended recipient, please send an e-mail to <a href="mailto:admin@yellowcas.com">admin@yellowcas.com</a> to inform us of the mistake, and please destroy any and all copies of this e-mail.
</font>
</p>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table width="100%" border="0" bgcolor="#ADD8E6">
<tr>
<td align="center">
<font size="-2">All content, images, and data &#0169; Bright Futures 2009-2014.
<br />
All rights reserved.
</font>
</td>
</tr>
</table>
</td>
</tr>
</table>

--PHP-alt-8d0c53f7f76522e3a03197894d7e89fe--

我为此感到抱歉这么久，但我无法弄清楚为什么gmail没有将html显示为html。我正在使用php mail（）函数发送电子邮件。我看过的每个其他电子邮件客户端都可以很好地呈现html，但是gmail只是在电子邮件中显示底层代码。如果任何人有任何想法，我将非常感谢听到他们。感谢您抽出宝贵时间查看我的代码。

Answer 1

我注意到您正在使用\r\n。 Gmail不再呈现它。如果将其替换为\n，则应在gmail处呈现。

之前我发现它是因为我吓坏了gmail不再渲染它了。经过一项研究，我结束了this blog，解决了我的“小问题”。

Answer 2

以下是我为系统解决此问题所采取的措施。

第一：经过一些研究以及反复试验后，我发现Gmail和Thunderbird都会在标题行的末尾对齐额外的字符。＆＃34; \ R＆＃34;算作额外的字符，空格也是如此。我删除了所有＆＃34; \ r＆＃34;整个事情中的字符是肯定的，因为我的代码编辑程序有时会在编辑时添加它们（我在不同的操作系统之间切换很多）。为此，您可以使用输出缓冲区。

 ob_start();

 // all of your output here like normal

 $output = str_replace("\r","",ob_get_clean());
 echo $output;  // now your output has no "\r" characters

第二：我仔细检查了我的MIME兼容性。我碰巧在一个地方错过了一个分号，但在另一个地方有一个额外的分号，我在几个地方也有额外的空格。您有不必要的（有时可能是不允许的）引号。这是一个更好的方法来做标题，以便您可以清楚地看到可能有额外字符的位置。通过使用数组构建标题并使用＆＃34; \ n＆＃34;进行插入，我保证没有＆＃34; \ r＆＃34;两端的字符或空格。从技术上讲，您不必将变量放入括号{}，但为了清晰起见，我总是这样做。

$replyToName = trim($replyToName);
$replyTo = trim($replyTo);

$headers = array();
$headers[] = "MIME-Version: 1.0";
$headers[] = "From: {$replyToName} <{$replyTo}>";
$headers[] = "Reply-To: {$replyTo}";
$headers[] = "X-Mailer: PHP/".phpversion();
$headers[] = "Content-Type: multipart/alternative;boundary=PHP-alt-{$random_hash}";
$headers = implode("\n", $headers)."\n";

第三：与您一样，我遇到了DNS问题，Gmail通过添加X-AntiAbuse标头来响应。你不想看到那些，因为它们意味着你离垃圾邮件文件夹只有一步之遥。您应该转到http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/default.aspx并按照向导为DNS创建新的SPF行，然后将向导创建的内容复制并粘贴到DNS条目中。如果您不知道这意味着什么，请致电您的网络托管服务商的技术支持，他们应该引导您完成它。

您当前的DNS：

v=spf1 a mx ptr include:secureserver.net ~all

它应该是这样的：

v=spf1 a mx ip4:107.4.20.247 ptr:secureserver.net a:secureserver.net include:secureserver.net ~all

通过设置＆＃34; ptr＆＃34;和＆＃34; a＆＃34;您的电子邮件服务器（Secureserver.net根据您在问题中粘贴的内容）的值，它允许Gmail和其他接收服务器知道您的电子邮件服务器可以为您发送电子邮件。包含您网站的特定IP地址会使更多电子邮件客户认为您不是垃圾邮件发送者。

顺便说一句，你真的不需要为你的边界字符串做一个md5哈希，而且与你的评论不同，它并不一定是＆＃34;唯一的，＆＃34;只是没有找到电子邮件的正文。只需输入一串绝对不会出现在任何电子邮件中的字母和数字，您就可以了。我的是＆＃34; BOUNDARY456BREAK＆＃34;。没有人会在电子邮件中写下这个。

Gmail不会使用PHP呈现HTML电子邮件

2 个答案: