PHPMailer fails to send - php

Question

I see most PHPMailer questions use IsSMTP(), but I'm working from a very basic example I found yesterday on SO (can't seem to find the link in History though) that doesn't.
require_once("class.phpmailer.php");
$email = new PHPMailer();
if (isset($_FILES['upload']['size']))
{
echo 'file size: '.(basename($_FILES['upload']['size'])* 1024).'<br />';
if (move_uploaded_file($_FILES['upload']['tmp_name'], $target_path))
{
echo "The file ". basename( $_FILES['upload']['name'])." has been uploaded<br />";
$email->AddAttachment($target_path);
}
else
{
echo "There was an error uploading the file, please try again!<br /> ".basename($_FILES['upload']['error']);
}
}
else
{
echo "No file was found for the upload.<br />";
}
$email->To = "me#this.com";
$email->From = $email_from;
$email->FromName = $first_name;
$email->Subject = "Query from website";
$email->Body = $email_message;
//echo "mail built...<br />";
if (!$email->Send())
{
echo "Mailer error: " . $email->ErrorInfo;
}
I've tried sending twice. The code executes fine and the last if statement returns true.
Do I have to use IsSMTP()? If so, does it have to route through SSL like I've seen suggested here?
Thanks in advance?
EDIT
I've added details required for SMTP as follows:
$email->IsSMTP();
$email->Host = "localhost";
$email->Port = 465;
$email->SMTPAuth = true;
$email->Username = "bacon";
$email->Password = "4ndCh33se";
This doesn't seem to have triggered it to send. There also still isn't any error reported.
EDIT
Turns out there was an error, I had a redirect in a weird place that was preventing me from seeing it. The error is as follows:
You must provide at least one mailer is not supported.

Answer 1

Initially, the addition of the IsSMTP() seemed vital and was implemented as per other answers.
All answers failed, however, to address one missing piece of the puzzle.
PHPMailer requires at least 1 address to be added as per below. I just used the same address here as was set in the To property:
$email->To = "me#this.com";
$email->AddAddress("me#this.com");
Once this was done, all worked perfectly fine.

Answer 2

if you want to send mail through smtp you need to set SMTP username and password and other setting.
And also you need to add IsSMTP().
Example Gmail SMTP setup
$this->SwiftMailer->smtpType = 'tls';
$this->SwiftMailer->smtpHost = 'smtp.gmail.com';
$this->SwiftMailer->smtpPort = 587;
$this->SwiftMailer->smtpUsername = 'emailaddress#gmail.com';
$this->SwiftMailer->smtpPassword = 'gmailPassword';
$this->SwiftMailer->sendAs = 'html';
$this->SwiftMailer->from = 'sender#gmail.com';
$this->SwiftMailer->fromName = 'Sender Name';
$this->SwiftMailer->to = "receiver#anything.com";
$this->Email->sendAs = 'html';

Answer 3

$email->To = "me#this.com";
$email->From = $email_from;
$email->FromName = $first_name;
$email->Subject = "Query from website";
$email->Body = $email_message;
I have the following besides yours. Maybe it helps:
$email->IsSMTP(); // set mailer to use SMTP
$email->Host = "mail.webaddress.com"; // specify main and backup server
$email->SMTPAuth = true; // turn on SMTP authentication
$email->Username = "********"; // SMTP username
$email->Password = "********"; // SMTP password
I have changed nothing in class.phpmailer.php
Try this
$email->IsSMTP(); // set mailer to use SMTP
$email->Host = "mail.webaddress.com"; // specify main and backup server
$email->SMTPAuth = false; // turn on SMTP authentication
$email->Port = 25
$email->SMTPSecure = "";
$email->Username = "********"; // SMTP username
$email->Password = "********"; // SMTP password