这是构建/发送电子邮件的脚本：
$boundary = md5(date('U'));
$to = $email;
$subject = "My Subject";
$headers = "From: myaddress@mydomain.com" . "\r\n".
"X-Mailer: PHP/".PHPversion() ."\r\n".
"MIME-Version: 1.0" . "\r\n".
"Content-Type: multipart/alternative; boundary=--$boundary". "\r\n".
"Content-transfer-encoding: 7bit". "\r\n";
$text = "You really ought remember the birthdays";
$html = '<html>
<head>
<title>Birthday Reminders for August</title>
</head>
<body>
<p>Here are the birthdays upcoming in August!</p>
<table>
<tr>
<th>Person</th><th>Day</th><th>Month</th><th>Year</th>
</tr>
<tr>
<td>Joe</td><td>3rd</td><td>August</td><td>1970</td>
</tr>
<tr>
<td>Sally</td><td>17th</td><td>August</td><td>1973</td>
</tr>
</table>
</body>
</html>
';
$message = "Multipart Message coming up" . "\r\n\r\n".
"--".$boundary.
"Content-Type: text/plain; charset=\"iso-8859-1\"" .
"Content-transfer-encoding: 7bit".
$text.
"--".$boundary.
"Content-Type: text/html; charset=\"iso-8859-1\"".
"Content-transfer-encoding: 7bit".
$html.
"--".$boundary."--";
mail("toAddress@example.com",$subject,$message,$headers);
它发送消息就好了,我的收件人收到了它,但是他们用text / plain而不是multipart / alternative来获取整个内容.查看收到的消息的来源给出了这一点(删除了许多内容)：
Delivered-To: myrecipient@example.com
Received: by 10.90.100.4 with SMTP id x4cs111413agb;
Wed,25 Mar 2009 16:39:32 -0700 (PDT)
Received: by 10.100.153.6 with SMTP id a6mr85081ane.123.1238024372342;
Wed,25 Mar 2009 16:39:32 -0700 (PDT)
Return-Path: <xxx@xxxx.com>
--- snip ---
Date: Wed,25 Mar 2009 17:37:36 -0600 (MDT)
Message-Id: <200903252337.n2PNbaw2019541@www.xxxxxxx.com>
To: trevor@saturdayplace.com
Subject: My Subject
From: me@mydomain.com
X-Mailer: PHP/4.3.9
MIME-Version: 1.0
Content-Type: text/plain;
boundary="--66131caf569f63b24f43d529d8973560"
Content-transfer-encoding: 7bit
X-OriginalArrivalTime: 25 Mar 2009 23:38:30.0531 (UTC) FILETIME=[CDC4E530:01C9ADA2]
X-TM-AS-Product-Ver: SMEX-8.0.0.1181-5.600.1016-16540.005
X-TM-AS-Result: No--4.921300-8.000000-31
X-TM-AS-User-Approved-Sender: No
X-TM-AS-User-Blocked-Sender: No
Multipart Message coming up
--66131caf569f63b24f43d529d8973560
Content-Type: text/plain; charset="iso-8859-1"
Content-transfer-encoding: 7bit
You really ought remember the birthdays
--66131caf569f63b24f43d529d8973560
Content-Type: text/html; charset="iso-8859-1"
Content-transfer-encoding: 7bit
<html>
<head>
<title>Birthday Reminders for August</title>
</head>
<body>
<p>Here are the birthdays upcoming in August!</p>
<table>
<tr>
<th>Person</th><th>Day</th><th>Month</th><th>Year</th>
</tr>
<tr>
<td>Joe</td><td>3rd</td><td>August</td><td>1970</td>
</tr>
<tr>
<td>Sally</td><td>17th</td><td>August</td><td>1973</td>
</tr>
</table>
</body>
</html>
--66131caf569f63b24f43d529d8973560--
看起来内容类型标题在从multipart / alternative到text / plain的过程中发生了变化.我不是系统管理员,所以如果这是一个sendmail问题,我就在我脑海中.有什么建议？
这条线
"Content-Type: multipart/alternative; boundary=--$boundary". "\r\n".
应该
"Content-Type: multipart/alternative; boundary=$boundary". "\r\n".
您不在标题中包含短划线.