PHP邮件函数忽略其他标题

我正在尝试使用php mail（）函数发送邮件 但由于某些原因，我不明白，额外的标题被忽略

这是我的代码：

$errors = '';
    $myemail = 'my@email.com';
    $myemail_bcc = 'my_bbc@email.com';
    if(empty($_POST['nome'])  ||   empty($_POST['email']))
    {
        $errors .= "Error: You must fill Name and Email fields";
    }

    $name = $_POST['nome'];
    $email_address = $_POST['email'];
    $telefono = $_POST['telefono'];
    $message = $_POST['messaggio'];

    if (!preg_match(
    "/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/i",
    $email_address))
    {
        $errors .= "<br />Error: You must use a valid email address";
    }

    // spediamo la mail
    if( empty($errors))
    {
        $to = $myemail;
        $email_subject = "New Request from: $name";

        $email_body = "User data:.\n\n";
        $email_body .= "Nome: $name \nEmail: $email_address \nTelefono: $telefono \n";
        $email_body .= "Messaggio: \n$message";

        $headers = "From: John Smith <$myemail>\r\n";
            $headers .= "Reply-To: $name <$email_address>\r\n";
            $headers .= "Bcc: $myemail_bcc";

        mail($to,$email_subject,$email_body,$headers); 

        }

甚至在一条线上

$headers = "From:  $myemail\r\nReply-To: $name <$email_address>\r\nBcc: $myemail_bcc";

$headers=“From:$myemail\r\n提交至：$name\r\nBcc:$myemail\u bcc”；

但在任何情况下，邮件都不会发送到密件抄送地址，客户端电子邮件中的“回复”功能也不会使用“回复到”地址

---

我错在哪里？

您是否尝试过使用

PHP\u EOL

常量而不是

\r\n

？另一方面，请务必注意。我曾经遇到过类似的情况，并且被告知要声明$headers。='MIME版本：1.0'。“\r\n”$标题。='内容类型：文本/普通；字符集=iso-8859-1'。“\r\n”；对于未来的读者，您绝对不想使用

PHP\u EOL

。

$headers = "From:  $myemail\r\nReply-To: $name <$email_address>\r\nBcc: $myemail_bcc";