Php "localhost" port 25, verify your "SMTP" and "smtp_port" Hatası

<form action="mail.php" method="POST">
<p>Name</p> <input type="text" name="name">
<p>Email</p> <input type="text" name="email">
<p>Phone</p> <input type="text" name="phone">

<p>Request Phone Call:</p>
Yes:<input type="checkbox" value="Yes" name="call"><br />
No:<input type="checkbox" value="No" name="call"><br />

<p>Website</p> <input type="text" name="website">

<p>Priority</p>
<select name="priority" size="1">
<option value="Low">Low</option>
<option value="Normal">Normal</option>
<option value="High">High</option>
<option value="Emergency">Emergency</option>
</select>
<br />

<p>Type</p>
<select name="type" size="1">
<option value="update">Website Update</option>
<option value="change">Information Change</option>
<option value="addition">Information Addition</option>
<option value="new">New Products</option>
</select>
<br />

<p>Message</p><textarea name="message" rows="6" cols="25"></textarea><br />
<input type="submit" value="Send"><input type="reset" value="Clear">
</form>

<?php
$name = $_POST['name'];
$email = $_POST['email'];
$phone = $_POST['phone'];
$call = $_POST['call'];
$website = $_POST['website'];
$priority = $_POST['priority'];
$type = $_POST['type'];
$message = $_POST['message'];
$formcontent=" From: $name \n Phone: $phone \n Call Back: $call \n Website: $website \n Priority: $priority \n Type: $type \n Message: $message";
$recipient = "admin@xxx.net";
$subject = "Contact Form";
$mailheader = "From: $email \r\n";
mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
echo "Thank You!";
?>

<?php

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'config/connect.php';


require "vendor/autoload.php";
 
$secret  = $secret_key;
$sitekey = $site_key;
$captcha = new \Anhskohbo\NoCaptcha\NoCaptcha($secret, $sitekey);

require 'PHPMailer/Exception.php';
require 'PHPMailer/PHPMailer.php';
require 'PHPMailer/SMTP.php';

$send_msg = "";

if(isset($_POST['send'])) {
    if($captcha->verifyResponse($_POST['g-recaptcha-response'])) {
        $email = $_POST['email'];
        $name = $_POST['name'];
        $subject = $_POST['subject'];
        $type = $_POST['type'];
        $body = $_POST['message'];
        
        if(isset($_FILES['file']['name']) && $_FILES['file']['name'] != "") {
            $file = 'attach/' . basename($_FILES['file']['name']);
            move_uploaded_file($_FILES['file']['tmp_name'], $file);
        } else {
            $file = "";
        }


        $mail = new PHPMailer();
        $mail->isSMTP();
        $mail->Host = $smtp_host;
        $mail->SMTPAuth = true;
        $mail->Username = $smtp_user;
        $mail->Password = $smtp_pass;
        $mail->SMTPSecure = 'tls';
        $mail->Port = $smtp_port;

        //sender from

        $mail->setFrom($email, $name);
        $mail->addAddress($myemail);
        $mail->addReplyTo($email, 'Information');

        if(isset($_POST['copy'])) {
            $mail->addCC($email);
        }
        $mail->addAttachment($file);

        $mail->isHTML(true);
        $mail->Subject = $subject;
        $mail->Body    = $body;

        if($mail->send()) {
            $send_msg = '<div align="center" class="alert alert-success">Message has been sent</div>';
            } 
            else {
            $send_msg = '<div align="center" class="alert alert-danger">Message could not be sent. Mailer Error: ' . $mail->ErrorInfo . '</div>';
        }
        if(isset($_FILES['file']['name']) && $_FILES['file']['name'] != "") {
            unlink($file);
        }
    } else {
        $send_msg = "Please verify you not a Robot";
    }

}








?>