PHP does not recognize auto Sponse

Question

I don’t know which error my form is not sending the email reply to the event subscriber. It redirects, I receive his data but it does not receive an email confirming the registration.

Can you help me? I will post my html and php code here.

HTML:

<form action="post.php" method="POST">
<input required type="text"  name="nome" type="name" class="form-control" id="nome">        
<input required name="email" type="text" class="form-control" id="email">
<input required type="text" placeholder="(DD)XXXXX-XXXX" name="celular" type="phone" class="form-control" id="celular">
<input required type="text" placeholder="XX/XX/XXXX" type="birthday" name="nascimento" class="form-control" id="nascimento">
<input required type="text"  type="number" name="cpf" class="form-control" id="nascimento">
<input name="endereco" required type="text" class="form-control" id="endereco">
<input name="numero" required type="text" class="form-control" id="numero">
<input name="complemento" type="text" class="form-control" id="complemento">
<input name="bairro" required type="text" class="form-control" id="bairro">
<input name="cidade" required type="text" class="form-control" id="cidade">
<input name="estado" required type="text" class="form-control" id="estado">
<input name="pais" required type="text" class="form-control" id="pais">
<input name="empresaouinstituicao" required type="text" class="form-control" id="empresa">
<input name="cargo" required type="text" class="form-control" id="cargo">
<input name="telcomercial" required type="text" class="form-control" id="tel-comercial">
<label>Como tomou conhecimento?  <span style="color: red">*</span>
    
    <select name="comosoube" required type="text" class="form-control" id="conhecimento">
        <option disabled selected value>Escolha uma opção</option>
        <option value="anuncios">opcao1</option>    
        <option value="apoiadores">opcao2</option>  
        <option value="crcapc">opcao3</option>  
        <option value="poremail">opcao4</option>          
        
    </select>

PHP

require_once("autenvio/PHPMailerAutoload.php");

$mail = new PHPMailer();

$mail->IsSMTP(); 
$mail->Host = "smtp.site1.com.br"; 
$mail->SMTPAuth = true; 
$mail->Port = 587;
$mail->SMTPSecure = false; 
$mail->SMTPAutoTLS = false; 
$mail->Username = '[email protected]'; 
$mail->Password = '********';

$mail->Sender = "[email protected]"; 
$mail->From = "[email protected]"; 
$mail->FromName = "[email protected]"; 

$mail->AddAddress('[email protected]', 'Nome - Recebe1'); 

$mail->IsHTML(true); 
$mail->CharSet = 'utf-8'; 

$mail->Subject  = "formulario"; // 
$mail->Body .= "".$_POST['nome'].";".$_POST['email'].";".$_POST['celular'].";".$_POST['nascimento'].";".$_POST['cpf'].";".$_POST['endereco'].";".$_POST['numero'].";".$_POST['complemento'].";".$_POST['bairro'].";".$_POST['cidade'].";".$_POST['estado'].";".$_POST['pais'].";".$_POST['cep'].";".$_POST['publicoouprivado'].";".$_POST['empresaouinstituicao'].";".$_POST['cargo'].";".$_POST['telcomercial'].";".$_POST['comosoube']."
"; 

$enviado = $mail->Send();

$mail->ClearAllRecipients();

if($mail->Send()) {
    $autoRespond = new PHPMailer();
    
    $autoRespond->IsSMTP();
    $autoRespond->CharSet    = 'UTF-8';
    $autoRespond->SMTPDebug  = 0;
    $autoRespond->SMTPAuth   = TRUE;
    $autoRespond->SMTPSecure = false;
    $autoRespond->Port       = 587;
    $autoRespond->Username   = "[email protected]";
    $autoRespond->Password   = "********";
    $autoRespond->Host       = "smtp.site1.com.br";
    
    $autoRespond->setFrom('[email protected]', 'inscricao');
    $autoRespond->addAddress($_email);
    $autoRespond->Subject = "INSCRICAO RECEBIDA"; 
    $autoRespond->Body = "Nós recebemos sua Inscrição no evento";
    
    $autoRespond->Send(); 
}

$urls = array(
'anuncios'=>'confirmacao.html',
'apoiadores'=>'confirmacao.html',
'crcapc'=>'confirmacaocrcapc.html',
'poremail'=>'confirmacao.html');
if (!empty($_REQUEST['comosoube'])) {
    $soube = $_REQUEST['comosoube'];
    $qs = $_SERVER['QUERY_STRING'];
    $qs = ($qs != '') ? '?' . $qs : "";
    $url = $urls[$soube] . $qs;
    header("location: $url");
}