trouble to send mail from XAMPP servver

Question

I have been trying so many times to send mail from xampp, for that I set all things which is required but still mail function is not working.

I have tried with the following steps:

1. Remove ; from php.ini file where extension=php_openssl.dll

2. [mail function]

   SMTP=smtp.gmail.com
   smtp_port=587
   sendmail_from = [email protected]
   sendmail_path = "\"c:\xampp\sendmail\sendmail.exe\" -t"
   

3. C:\xampp\sendmail

   [sendmail]

   smtp_server=smtp.gmail.com
   smtp_port=587
   error_logfile=error.log
   debug_logfile=debug.log
   [email protected]
   auth_password=(My passowd)
   [email protected]
   

4. And My PHP code is

    $to = '[email protected]';
    $subject = 'This is subject';
    $message = 'This is HTML message';
    $header ='From:[email protected]';
    $send = mail($to,$subject,$message,$header);
   
    if($send == true) 
    {echo "Mail Sent";}
    else 
    { echo "Error";}