Phpmailer and mail() not working?

Question

PHPMailer

Hello.
Tell me, please, what is the problem. Sending emails with regular php mail() is fine.
When using the phpMailer library, there is no sending.

include_once "class.phpmailer.php";

$mail = new PHPMailer();
        $mail->IsMail();
        $mail->IsHTML(false);
    
        $mail->From      = '[email protected]';
        $mail->FromName  = 'name';
        $mail->Subject   = 'test';
        $mail->Body      = 'phpmailer';
        $mail->AddAddress('[email protected]');
        echo $mail->Send();

        echo 'Mailer Error: ' . $mail->ErrorInfo;

Returns "1Mailer Error:", i.e. There appear to be no errors. The letter does not arrive. There is nothing in the logs.
Tell me where to dig.
Thank you.
---
Added: Issue resolved. The point is most likely in the ban gmail server ip.

Answer 1

Some free hosting companies do this.

Answer 2

$('ul.menu a').on('click', function(e){
  var goto = $(this).data('anchor');
  $('html,body').stop().animate({ scrollTop: $(goto).offset().top-60 }, 1000);
  e.preventDefault();
});

Menu itself:

<ul class="menu">
            <li><a href="#" data-anchor="#about">О компании</a></li>
            <li><a href="#" data-anchor="#features">Услуги</a></li>
            <li><a href="#" data-anchor="#calculate">Онлайн расчет</a></li>
            <li><a href="#" data-anchor="#faq">Ответы на вопросы</a></li>
          </ul>

In data-anhor, specify the ID of the block to which to scroll when clicking on the link.

Answer 3

No matter how I try, it doesn't work, not data-scroll, not data-anchor.