<?php
require( 'class.phpmailer.php' );

  $mail = new PHPMailer;
  $mail->IsSMTP();
  $mail->SMTPAuth = true;
  $mail->Host = "tls://smtp.gmail.com";
  $mail->Port = 25;
  $mail->Username = "xxxx@gmail.com";
  $mail->Password = "xxxxx";
  //Sending the actual email
  $mail->setFrom('xxxx2@gmail.com', 'Aaron');
  $mail->addAddress('xxxx2@gmail.com', 'Aaron');     // Add a recipient
  $mail->isHTML(false);                                  // Set email format to HTML
  $mail->Subject = 'Calculation form results from ';
  $mail->Body = 'testing...';

  if(!$mail->send()) {
    echo 'Message could not be sent. ';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
    exit;
  }
?>

//Create a new PHPMailer instance
$mail = new PHPMailer;

//Tell PHPMailer to use SMTP
$mail->isSMTP();

//Set the hostname of the mail server
$mail->Host = 'smtp.gmail.com';
// use
// $mail->Host = gethostbyname('smtp.gmail.com');
// if your network does not support SMTP over IPv6

//Set the SMTP port number - 587 for authenticated TLS
$mail->Port = 587;

//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';

//Whether to use SMTP authentication
$mail->SMTPAuth = true;

//Username to use for SMTP authentication - use full email address for gmail
$mail->Username = "username@gmail.com";

//Password to use for SMTP authentication
$mail->Password = "yourpassword";

//Set who the message is to be sent from
$mail->setFrom('from@example.com', 'First Last');

//Set an alternative reply-to address
$mail->addReplyTo('replyto@example.com', 'First Last');

//Set who the message is to be sent to
$mail->addAddress('whoto@example.com', 'John Doe');