mail() 标头是否必须以换行符终止？（IncrediMail 问题）

发布于 2024-11-19 18:24:02 字数 1720 浏览 5 评论 0原文

我正在使用一个发送 UTF8 电子邮件的函数。由于至少一个收件人对我的函数发送的电子邮件有问题（不是 UTF8，因此特殊字符被破坏；一些邮件标头出现在正文中），我想知道是否必须在标头字符串末尾再添加一个换行符：

function mail_utf8($to, $subject = "(No subject)", $message = "", $header = "")
{
   $header_ = 'MIME-Version: 1.0'."\r\n".'Content-type: text/plain; charset=UTF-8'."\r\n";
   $header_ .= "From: [email protected]"; //Should be optional...
   if (!empty($header)) $header_ .= "\r\n".$header;
   $out = mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_);

   return $out;
}

那么什么是正确的 - mail_utf8("[电子邮件受保护]"、""、"blah"、"") 或 mail_utf8("[电子邮件受保护]"、""、"blah"、"\r\n")？

编辑：针对此类问题的明显资源 - www.php.net/mail - 仅在示例#4 中使用这样的换行符，与#2 不同。

Edit2：这是当前版本。请参阅评论以获取更多信息。

function mail_utf8($to, $subject = "(No subject)", $message = "", $header = "")
{
$linebreak = PHP_EOL; //Seems to work everywhere, including IncrediMail
$linebreak = "\n"; //Debug
$header_ = 'MIME-Version: 1.0'.$linebreak.'Content-type: text/plain; charset=UTF-8'.$linebreak;
$header_ .= "From: [email protected]".$linebreak;
if (!empty($header)) $header_ .= $header.$linebreak; //Last line break !?
$out = mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_);

return $out;
}

原文

I'm using a function for sending UTF8 emails.
Since at least one recipient has issues with emails sent by my function (not UTF8, so special chars broken; some mail headers appear in body), I'm wondering if I have to put another line break at the end of the header string:

function mail_utf8($to, $subject = "(No subject)", $message = "", $header = "")
{
   $header_ = 'MIME-Version: 1.0'."\r\n".'Content-type: text/plain; charset=UTF-8'."\r\n";
   $header_ .= "From: [email protected]"; //Should be optional...
   if (!empty($header)) $header_ .= "\r\n".$header;
   $out = mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_);

   return $out;
}

So what's correct - mail_utf8("[email protected]", "", "blah", "") or mail_utf8("[email protected]", "", "blah", "\r\n")?

Edit: The obvious resource for that kind of matter - www.php.net/mail - uses such a line break only in example #4, unlike in #2.

Edit2: So here's the current version. See comments for further info.

function mail_utf8($to, $subject = "(No subject)", $message = "", $header = "")
{
$linebreak = PHP_EOL; //Seems to work everywhere, including IncrediMail
$linebreak = "\n"; //Debug
$header_ = 'MIME-Version: 1.0'.$linebreak.'Content-type: text/plain; charset=UTF-8'.$linebreak;
$header_ .= "From: [email protected]".$linebreak;
if (!empty($header)) $header_ .= $header.$linebreak; //Last line break !?
$out = mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_);

return $out;
}

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勿挽旧人 2024-11-26 18:24:02

尝试仅使用 \n 而不是 \r\n 终止每个标题行。

如果未收到消息，请尝试仅使用 LF (\n)。有些穷
优质 Unix 邮件传输代理自动将 LF 替换为 CRLF
（如果使用 CRLF，则会导致 CR 加倍）。这应该是最后一次
度假村，因为它不符合 » RFC 2822。

来源：PHP mail() 函数

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天赋异禀 2024-11-26 18:24:02

我认为你不能像在第 5 行那样在标题顶部传递换行符，并尝试避免使用大量引号，这看起来很混乱。

您的函数的重构示例：

  function mail_utf8($to, $subject = "(No subject)", $message = "", $header = "") {
    $header_  = "MIME-Version: 1.0\r\nContent-type: text/plain; charset=UTF-8\r\n";
    $header_ .= "From: [email protected]\r\n";
    if(!empty($header)) $header_ .= $header;
    $out = mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_);
    return $out;
  }

I think that you can't pass a line break on top of header like you do on line 5, and try avoid alot of quotes, its look like confuse.

A re-factored exemple of your function:

  function mail_utf8($to, $subject = "(No subject)", $message = "", $header = "") {
    $header_  = "MIME-Version: 1.0\r\nContent-type: text/plain; charset=UTF-8\r\n";
    $header_ .= "From: [email protected]\r\n";
    if(!empty($header)) $header_ .= $header;
    $out = mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $message, $header_);
    return $out;
  }

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