require_once "Mail.php";

    $from = "FPM <forms@fpmofames.com>";
    $from_name = "FPM";

    $host = "localhost";
    $username = "username";
    $password = "password";

    $subject = "Subject";
    $message = "Message";

    $to = "<example@example.com>";
    $headers = array ('From' => $from,
        'To' => $to,
        'Subject' => $subject,
        'MIME-Version' => '1.0',
        'Content-Type' => "text/html; charset=ISO-8859-1"
    );

    $smtp = Mail::factory('smtp',
        array ('host' => $host,
            'auth' => true,
            'username' => $username,
            'password' => $password));

    $mail = $smtp->send($to, $headers, $message);

<?php
require_once "Mail.php";
$url = $_GET['baseUrl']; // source url
$success = false;
$senderName = isset( $_GET['txtname'] ) ? preg_replace( "/[^.-' a-zA-Z0-9]/", "", $_GET['txtname'] ) : "";
$senderEmail = isset( $_GET['txtemail'] ) ? preg_replace( "/[^.-_@a-zA-Z0-9]/", "", $_GET['txtemail'] ) : "";
$msg = isset( $_GET['txtDesc'] ) ? preg_replace( "/(From:|To:|BCC:|CC:|Subject:|Content-Type:)/", "", $_GET['txtDesc'] ) : "";
$body = '<table width="400" border="0">
  <tr>
    <th scope="col">Name:</th>
    <th scope="col">'.$senderName.'</th>
  </tr>
  <tr>
    <th scope="col">Company:</th>
    <td scope="col">'.$_GET['txtCompany'].'</td>
  </tr>
  <tr>
    <th scope="row">Phone:</th>
    <td>'.$_GET['txtphone'].'</td>
  </tr>
  <tr>
    <th scope="row">E-mail:</th>
    <td>'.$senderEmail.'</td>
  </tr>
  <tr>
    <th scope="row">URL:</th>
    <td>'.$url.'</td>
  </tr>
  <tr>
    <th scope="row">Massage:</th>
    <td>'.$msg.'</td>
  </tr>
</table>';

 $from = $senderName."<".$senderEmail.">";
 $to = "Contact ManagerHR<info@aequitas-infotech.com>";
 $subject = "Hi!";
 $host = "XXX.host.com";
 $username = "username@host.com";
 $password = "*****";
 /* MIME-Version should be "1.0rn" and Content-Type should be "text/html; charset=ISO-8859-1rn" to send an HTML Email */
$headers = array ('MIME-Version' => '1.0rn',
        'Content-Type' => "text/html; charset=ISO-8859-1rn",
        'From' => $from,
        'To' => $to,
        'Subject' => $subject
     );
$smtp = Mail::factory('smtp',
   array ('host' => $host,
     'auth' => true,
     'username' => $username,
     'password' => $password));
$mail = $smtp->send($to, $headers, $body);
 if (PEAR::isError($mail)) {
   echo("<p>" . $mail->getMessage() . "</p>");
  } else {
      header('Location: '.$url); // redirect to url where from inquiry made
   //echo("<p>Message successfully sent!</p>");
  }
 ?>

$crlf = "n";
    // Creating the Mime message
    $mime = new Mail_mime($crlf);

    // Setting the body of the email
    $mime->setTXTBody($text);
    $mime->setHTMLBody($html);
   ...
    $body = $mime->get();

Hi developers you can complete in two steps
Step 1: put code in your file

<?php
require 'PHPMailerAutoload.php';

$mail = new PHPMailer;

//$mail->SMTPDebug = 3;                               // Enable verbose debug output

$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'smtp.gmail.com';  // Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = 'user@example.com';                 // SMTP username
$mail->Password = 'secret';                           // SMTP password
$mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587;                                    // TCP port to connect to

$mail->setFrom('from@example.com', 'Mailer');
$mail->addAddress('joe@example.net', 'Joe User');     // Add a recipient
$mail->addAddress('ellen@example.com');               // Name is optional
$mail->addReplyTo('info@example.com', 'Information');
$mail->addCC('cc@example.com');
$mail->addBCC('bcc@example.com');

$mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
$mail->addAttachment('/tmp/image.jpg', 'new.jpg');    // Optional name
$mail->isHTML(true);                                  // Set email format to HTML

$mail->Subject = 'Here is the subject';
$mail->Body    = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

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


Step:2 Download this included file in given URL.
Url: https://github.com/PHPMailer/PHPMailer.git

and click on **clone or download**  button
and set folder your system.