PHP邮件功能无法完全发送电子邮件

Question

我已经为我的网站创建了一个简单的联系表，并对其进行了设置，以便在邮件通过时将其写在“ mailsent”链接中。它确实写有“已发送邮件”，但我实际上没有收到电子邮件。

<?php

if (isset($_POST['submit'])) {

    $name = $_POST['name'];
    $mailFrom = $_POST['mail'];
    $message = $_POST['message'];



    $mailTo = "myemail@email.com";
    $headers = "From: " . $mailFrom;
    $txt = "You have received an e-mail from " . $name . ".\n\n" . $message;

    mail($mailTo, $txt, $headers);
    header("Location: index.php?mailsent");
}

?>