PHPMailer: Send e-mail from form - html-email

Question

I would like to implement sending email function where I want to allow admin of the system I developed to be able to send email from HTML form to the desired members.
I have searched here and tried all the possible solutions but still could not make it work. I didn't receive the email and SMTPDebug didn't tell me anything. I also have turned off Gmail's less secure apps.
Can someone please point it out for me why it doesn't work?
This is my form:
<form name="compose" method="POST" action="sendmail.php">
<table>
<tr>
<thead>Compose New Message</thead>
</tr>
<tr>
<td>To</td>
<td>:</td>
<td>
<input type="text" id="to" size="57">
</td>
</tr>
<tr>
<td>Subject</td>
<td>:</td>
<td>
<input type="text" id="subject" size="57">
</td>
</tr>
<tr>
<td></td>
<td></td>
<td>
<textarea cols="39" rows="10" id="content"></textarea>
</td>
</tr>
<tr>
<td></td>
<td></td>
<td>
<input type="submit" id="submit" value="Send Message">
</td>
</tr>
</table>
</form>
And this is my sendmail.php :
<?php
require 'includes/PHPMailer/PHPMailerAutoload.php';
require 'includes/PHPMailer/class.smtp.php';
if(isset($_POST['submit']))
{
$recipient = $_POST['to'];
$subject = $_POST['subject'];
$body = $_POST['content'];
$mail = new PHPMailer;
$mail->isSMTP();
//smtp debugging
$mail->SMTPDebug = 2;
$mail->DebugOutput = 'html';
$mail->Host = 'smtp.gmail.com';
$mail->Host = gethostbyname('smtp.gmail.com');
$mail->Port = 587;
$mail->SMTPAuth = true;
$mail->SMTPKeepAlive = true;
$mail->SMTPSecure = 'tls';
$mail->Username = "myemail";
$mail->Password = "mypassword";
$mail->setFrom('myemail', 'Azie');
$mail->AddAddress = $recipient;
$mail->Subject = $subject;
$mail->Body = $body;
//send the message, check for errors
if (!$mail->send()) {
echo "Mailer Error: " . $mail->ErrorInfo;
} else {
echo "Message sent!";
}
}
?>