CodeIgniter 3 电子邮件不会向其他电子邮件服务器发送电子邮件，而是向苹果发送电子邮件

问：

出于某种原因，我只是收到苹果电子邮件的电子邮件，但 gmail、Microsoft 等。我正在使用带有SSL的自己的smtp服务器，我检查了SPF，没有问题。我还检查了标题等。

我也尝试使用 PHPMailer，但只使用 gmail smtp 发送。 任何解决此问题的帮助或指导将不胜感激！

function send_mail($to, $subject, $message) {
    $CI = get_instance();
    
    $email_library = get_email_library();

    if($email_library == 'codeigniter'){
        $email_config = Array();
        $email_config["protocol"] = "smtp";
        $email_config["charset"] = "utf-8";
        $email_config["mailtype"] = "html";
        $email_config["smtp_host"] = smtp_host();
        $email_config["smtp_port"] = smtp_port();
        $email_config["smtp_user"] = smtp_email();
        $email_config["smtp_pass"] = smtp_password();
        $email_config["smtp_crypto"] = smtp_encryption();
        if($email_config["smtp_crypto"] == 'none'){
            $email_config["smtp_crypto"] = "";
        }
        $CI->load->library('email', $email_config);
        $CI->email->clear(true);
        $CI->email->set_newline("\r\n");
        $CI->email->set_crlf("\r\n");
        $CI->email->from(from_email(), company_name());
        $CI->email->to($to);
        $CI->email->subject($subject);
        $CI->email->message($message);
        if($CI->email->send()){
            return true;
        }else{
            return false;
        }
    }else{
        require_once('vendor/phpmailer/class.phpmailer.php');
        $CI = new PHPMailer(); 
        $CI->IsSMTP(); 
        $CI->SMTPDebug = 1; 
        $CI->SMTPAuth = true;
        $CI->SMTPSecure = smtp_encryption();
        $CI->Host = smtp_host();
        $CI->Port = smtp_port();
        $CI->IsHTML(true);
        $CI->Username = smtp_email();
        $CI->Password = smtp_password();
        $CI->SetFrom(from_email());
        $CI->Subject = $subject;
        $CI->Body = $message;
        $CI->AddAddress($to);
        if($CI->Send()){
            return true;
        }else{
            return false;
        }
    }
}