The following from address failed in phpmailer code error using gmail Id

I have php source code which is used to send email. I have used phpmailer class and gmail id to send mail. It was working fine from last 1 year But  currently it stop working and through below error:
"The following From address failed: your@gmail.com"

Below was my source code :
<?php
require_once("class.phpmailer.php");
$mail = new PHPMailer(); 
$body="email body \n";
$mail->IsSMTP(); // telling the class to use SMTP
$mail->SMTPDebug  = 1;      // enables SMTP debug information (for testing)
                                                // 1 = errors and messages
                                              // 2 = messages only
  $mail->SMTPAuth   = true;                  // enable SMTP authentication
  $mail->SMTPSecure = "ssl";                 // sets the prefix to the servier
  $mail->Host      = "smtp.gmail.com";    // sets GMAIL as the SMTP server
  $mail->Port       = 465;                       // set the SMTP port for the GMAIL server
  $mail->Username   = "your-gmail-Id@gmail.com";  // GMAIL username
  $mail->Password   = "gmail password";            // GMAIL password  
  $mail->SetFrom('your-gmailid@gmail.com', 'Metropolis Delhi'); 
  $mail->AddReplyTo('your-gmailid@gmail.com', 'Metropolis Delhi');
  $mail->Subject    ="Email Subject";    
  $mail->Body =$body;
   if(!$mail->Send())
    {
       echo $mail->ErrorInfo;
      return false;
    }
    else
    {
      echo "Email Sent to !". $collname;
      }
?>

To solve this problem, First I login to gmail and go to ''setting' => Account and Import => update correct "Send mail as"  i.e. correct "From name" and email.

But problem is still not solved.

Now I change ssl to tls and port no 587 in my code.
 Now it is working fine. Below is code which is working fine.

<?php
require_once("class.phpmailer.php");
$mail = new PHPMailer(); 
$body="email body \n";
$mail->IsSMTP(); // telling the class to use SMTP
$mail->SMTPDebug  = 1;      // enables SMTP debug information (for testing)
                                                // 1 = errors and messages
                                              // 2 = messages only
  $mail->SMTPAuth   = true;                  // enable SMTP authentication
  $mail->SMTPSecure = "tls";                 // sets the prefix to the servier
  $mail->Host       = "smtp.gmail.com";    // sets GMAIL as the SMTP server
  $mail->Port       = 587;                       // set the SMTP port for the GMAIL server
  $mail->Username   = "your-gmail-Id@gmail.com";  // GMAIL username
  $mail->Password   = "your-password";            // GMAIL password  
  $mail->FromName="From Name";  // correct from name
  $mail->From="your-gmailId@gmail.com";
  $mail->AddReplyTo('your-gmail-Id@gmail.com', 'Metropolis Delhi');
  $mail->Subject    ="Email Subject";    
  $mail->Body =$body;
   if(!$mail->Send())
    {
       echo $mail->ErrorInfo;
      return false;
    }
    else
    {
      echo "Email Sent to !". $collname;
      }
?>