Login attempt blocked PHPMailer

Good evening,

I have a php code that sends a simple email to the user using a Gmail account, I've already enabled Access to less secure apps but I'm still having this return:

2015-04-01 01:24:04
CLIENT -> SERVER: EHLO localhost 2015-04-01 01:24:05
CLIENT -> SERVER: AUTH LOGIN 2015-04-01 01:24:05
CLIENT -> SERVER: YW1hLmJ1Z3NAZ21haWwuY29t 2015-04-01 01:24:06
CLIENT -> SERVER: cnB5cGtrYzg2eA== 2015-04-01 01:24:06
SMTP ERROR: Password command failed: 534-5.7.14 Please log in via your web browser and then try again. 534-5.7.14 
Learn more at 534 5.7.14 https://support.google.com/mail/bin/answer.py?answer=78754 91sm281474qkw.13 - gsmtp 2015-04-01 01:24:06
CLIENT -> SERVER: QUIT 2015-04-01 01:24:07 SMTP connect() failed.

[MAIL ERR]: SMTP connect() failed.

I tried some solutions that I saw on the internet but I did not succeed, here is my code snippet:

if ( $_SERVER["REQUEST_METHOD"] != "POST" ) {
    // Verifica se o POST está setado (existe)
    if ( !isset( $_POST ) ) {
        echo "error: post not set";
        exit();
    }
    echo "error: request is not a post";
    exit();
}

$mail_addr = utf8_decode( $_POST["mail"] );
$username  = utf8_decode( $_POST["username"] );

$dao = new UserDao();
$result = $dao->Select_GetUserID( $mail_addr );

$person_id = $result->id;

$html = file_get_contents("../view/template/template_mail.html");

$activate_url     = "localost/activate/"            + $person_id;
$donotdisturb_url = "localhost/account/notdisturb/" + $person_id;
$notmedude_url    = "localhost/account/notme/"      + $person_id;

$html = str_replace( '{USERNAME}',         htmlentities( $username ),  $html );
$html = str_replace( '{ACTIVATE_URL}',     htmlentities( $activate_url ),     $html );
$html = str_replace( '{DO_NOT_DISTURB}',   htmlentities( $donotdisturb_url ), $html );
$html = str_replace( '{IM_NOT_THIS_DUDE}', htmlentities( $notmedude_url ),    $html );

$mail = new PHPMailer();

$mail->IsSMTP();
$mail->Port       = 465;
$mail->Host       = "smtp.gmail.com";
$mail->IsHTML(true);
$mail->Mailer     = 'smtp';
$mail->SMTPSecure = 'ssl';
$mail->SMTPAuth   = true;
$mail->SMTPDebug  = 1;
$mail->Username   = "[email protected]";
$mail->Password   = "xxxxxxxxxx";

$mail->From       = "[email protected]";     // já tentei SetFrom
$mail->FromName   = "StayAround";
$mail->AddReplyTo( "xxxx" , "StayAround" );

$mail->AddAddress($mail_addr, $username);
$mail->Subject    = "Cadastro StayAround";
$mail->Body       = $html;

$send = $mail->Send();
$mail->ClearAllRecipients();

if ( $send ) {
    echo "mail sent";
    exit();
} else {
    echo "[MAIL ERR]: " . $mail->ErrorInfo;
    exit();
}

Thanks in advance for the help.