PHP+；后缀：所有电子邮件都复制到mailer守护进程

我有一个带有最新存储库（apt get）后缀的Ubuntu12.10盒。当我从

sendmail

命令行发送电子邮件时：

sendmail -r from@example.com -f from@example.com -t to@example.com

该电子邮件仅发送至

to@example.com

（这很好）

但是，当我使用PHP和此函数时：

function mymail($to, $subject, $message, $frommail = "from@example.com", $fromname = "From Me") {
  $subject = "=?utf-8?B?" . base64_encode($subject) . "?=";
  $from = $fromname . " <" . $frommail . ">";
  $headers = "From: " . $from . " \r\n";
  $headers .= "MIME-Version: 1.0\r\n";
  $headers .= "Content-type: text/html; charset=UTF-8\r\n";
  $headers .= "Content-Transfer-Encoding: base64\r\n\r\n";
  $message = base64_encode($message);
  $param = "-r " . $frommail . " \r\n";
  // Optionally tried also 
  // $param = "-r " . $frommail . " -f " . $frommail . " \r\n";
  mail($to, $subject, $message, $headers, $param);
}

然后是base64电子邮件。

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如何防止MAILER-DAEMON在通过PHP发送电子邮件时收到副本？

我不确定是否应该删除此问题，或者让它作为将来的帮助。我刚找到原因。在额外的参数中，我应该使用

$param = "-f" . $frommail;

没有

“\r\n”

而不是错误的：

$param = "-r " . $frommail . " \r\n";

$param = "-r " . $frommail . " \r\n";