<?php
/*
Verifica autenticação SMTP conta de e-mail
Requer instalar o PHPMailer
composer require phpmailer/phpmailer
*/

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

require_once 'vendor/autoload.php';

function checkContaMail($server, $port, $email, $pass) {
    $mail = new PHPMailer();

    $mail->SMTPOptions = array(
        'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
        )
    );

    $mail->isSMTP();

    $mail->Host = $server;
    $mail->Port = $port;
    $mail->SMTPAuth = true;     // turn on SMTP authentication

    if($port == 587) {
        $mail->SMTPSecure = 'tls'; // port = 587
    }
    else if($port == 465) {
        $mail->SMTPSecure = 'ssl'; // port = 465
    }
    $mail->AuthType = '';
    $mail->Realm = '';
    $mail->Username = $email;  // SMTP username
    $mail->Password = $pass; // SMTP password
    $mail->Timeout = 30;


    if($mail->smtpConnect()){
        $mail->smtpClose();
        return true;
    }
    else{
        return false;
    }
}