从表单中的“发件人”字段到电子邮件(未知发件人）

所以我在表单到电子邮件脚本的From:中显示发件人全名时遇到问题。

我有这个：

<?php
if(!$_POST) exit;
if (!defined("PHP_EOL")) define("PHP_EOL", "'r'n");
$name = $_POST['name'];
$comments = $_POST['comments'];
if(trim($name) == '') {
    echo '<div class="error_message">Attention! You must enter your name.</div>';
    exit();
}
$address = "example@example.com, example@example.com";

$e_subject =  '' . $name . ' has confirmed their attendance.';

$e_body = "$name blah blah blah blah" . PHP_EOL . PHP_EOL;
$e_content = "'"$comments'"" . PHP_EOL . PHP_EOL;
$e_reply = "Please do not reply to this email";
$msg = wordwrap( $e_body . $e_content . $e_reply, 70 );
$headers = "From: $name" . PHP_EOL;
$headers .= "MIME-Version: 1.0" . PHP_EOL;
$headers .= "Content-type: text/plain; charset=utf-8" . PHP_EOL;
$headers .= "Content-Transfer-Encoding: quoted-printable" . PHP_EOL;
if(mail($address, $e_subject, $msg, $headers)) {
    // Email has sent successfully, echo a success page.
    echo "<fieldset>";
    echo "<div id='success_page'>";
    echo "<h1>Success!</h1>";
    echo "<p>Thank you</p>";
    echo "</div>";
    echo "</fieldset>";
} else {
    echo 'ERROR!';
}

如果在名称字段中只输入一个单词/名称，但只要有两个或多个单词，它就会显示（未知发件人），则该方法有效。

我可以把名字分成两个字段，但我真的不想这么做。

我做错了什么？

谢谢！