PHPMailer Failer

I'm attempting to use PHPMailer to set up my email to receive emails/messages via a contact form on my website. I'm having trouble setting it up. Submitting the contact form calls this php file `sendemail.php`:

    <?php

    require_once('phpmailer/PHPMailerAutoload.php');

    $toemails = array();

    $toemails[] = array(
    				'email' => 'myRealEmail@yahoo.com', // Your Email Address
    				'name' => 'My Name' // Your Name
    			);

    // Form Processing Messages
    $message_success = 'We have <strong>successfully</strong> received your Message and will get Back to you as soon as possible.';

    // Add this only if you use reCaptcha with your Contact Forms
    $recaptcha_secret = 'your-recaptcha-secret-key'; // Your reCaptcha Secret

    $mail = new PHPMailer();

    // If you intend you use SMTP, add your SMTP Code after this Line
    $mail->IsSMTP();
    $mail->Host = "smtp.mail.yahoo.com";
    $mail->SMTPDebug = 0;
    $mail->SMTPAuth = true;
    $mail->Port = 587;
    $mail->SMTPSecure = 'tls';
    // $mail->SMTPSecure = 'ssl';
    $mail->Username = "---@yahoo.com";
    $mail->Password = "---";


    if( $_SERVER['REQUEST_METHOD'] == 'POST' ) {
    	if( $_POST['template-contactform-email'] != '' ) {

    		$name = isset( $_POST['template-contactform-name'] ) ? $_POST['template-contactform-name'] : '';
    		$email = isset( $_POST['template-contactform-email'] ) ? $_POST['template-contactform-email'] : '';
    		$phone = isset( $_POST['template-contactform-phone'] ) ? $_POST['template-contactform-phone'] : '';
    		$service = isset( $_POST['template-contactform-service'] ) ? $_POST['template-contactform-service'] : '';
    		$subject = isset( $_POST['template-contactform-subject'] ) ? $_POST['template-contactform-subject'] : '';
    		$message = isset( $_POST['template-contactform-message'] ) ? $_POST['template-contactform-message'] : '';

    		$subject = isset($subject) ? $subject : 'New Message From Contact Form';

    		$botcheck = $_POST['template-contactform-botcheck'];

    		if( $botcheck == '' ) {

    			$mail->SetFrom( $email , $name );
    			$mail->AddReplyTo( $email , $name );
    			foreach( $toemails as $toemail ) {
    				$mail->AddAddress( $toemail['email'] , $toemail['name'] );
    			}
    			$mail->Subject = $subject;

    			$name = isset($name) ? "Name: $name<br><br>" : '';
    			$email = isset($email) ? "Email: $email<br><br>" : '';
    			$phone = isset($phone) ? "Phone: $phone<br><br>" : '';
    			$service = isset($service) ? "Service: $service<br><br>" : '';
    			$message = isset($message) ? "Message: $message<br><br>" : '';

    			$referrer = $_SERVER['HTTP_REFERER'] ? '<br><br><br>This Form was submitted from: ' . $_SERVER['HTTP_REFERER'] : '';

    			$body = "$name $email $phone $service $message $referrer";

    			// Runs only when File Field is present in the Contact Form
    			if ( isset( $_FILES['template-contactform-file'] ) && $_FILES['template-contactform-file']['error'] == UPLOAD_ERR_OK ) {
    				$mail->IsHTML(true);
    				$mail->AddAttachment( $_FILES['template-contactform-file']['tmp_name'], $_FILES['template-contactform-file']['name'] );
    			}

    			// Runs only when reCaptcha is present in the Contact Form
    			if( isset( $_POST['g-recaptcha-response'] ) ) {
    				$recaptcha_response = $_POST['g-recaptcha-response'];
    				$response = file_get_contents( "https://www.google.com/recaptcha/api/siteverify?secret=" . $recaptcha_secret . "&response=" . $recaptcha_response );

    				$g_response = json_decode( $response );

    				if ( $g_response->success !== true ) {
    					echo '{ "alert": "error", "message": "Captcha not Validated! Please Try Again." }';
    					die;
    				}
    			}

    			$mail->MsgHTML( $body );
    			$sendEmail = $mail->Send();

    			if( $sendEmail == true ):
    				echo '{ "alert": "success", "message": "' . $message_success . '" }';
    			else:
    				echo '{ "alert": "error", "message": "Email <strong>could not</strong> be sent due to some Unexpected Error. Please Try Again later.<br /><br /><strong>Reason:</strong><br />' . $mail->ErrorInfo . '" }';
    			endif;
    		} else {
    			echo '{ "alert": "error", "message": "Bot <strong>Detected</strong>.! Clean yourself Botster.!" }';
    		}
    	} else {
    		echo '{ "alert": "error", "message": "Please <strong>Fill up</strong> all the Fields and Try Again." }';
    	}
    } else {
    	echo '{ "alert": "error", "message": "An <strong>unexpected error</strong> occured. Please Try Again later." }';
    }

    ?>

Which calls this `PHPMailerAutoload.php` file:

    <?php
    /**
     * PHPMailer SPL autoloader.
     * PHP Version 5
     * @package PHPMailer
     * @link https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project
     * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
     * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
     * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
     * @author Brent R. Matzelle (original founder)
     * @copyright 2012 - 2014 Marcus Bointon
     * @copyright 2010 - 2012 Jim Jagielski
     * @copyright 2004 - 2009 Andy Prevost
     * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
     * @note This program is distributed in the hope that it will be useful - WITHOUT
     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     * FITNESS FOR A PARTICULAR PURPOSE.
     */

    /**
     * PHPMailer SPL autoloader.
     * @param string $classname The name of the class to load
     */
    function PHPMailerAutoload($classname)
    {
        //Can't use __DIR__ as it's only in PHP 5.3+
        $filename = dirname(__FILE__).DIRECTORY_SEPARATOR.'class.'.strtolower($classname).'.php';
        if (is_readable($filename)) {
            require $filename;
        }
    }

    if (version_compare(PHP_VERSION, '5.1.2', '>=')) {
        //SPL autoloading was introduced in PHP 5.1.2
        if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
            spl_autoload_register('PHPMailerAutoload', true, true);
        } else {
            spl_autoload_register('PHPMailerAutoload');
        }
    } else {
        /**
         * Fall back to traditional autoload for old PHP versions
         * @param string $classname The name of the class to load
         */
        function __autoload($classname)
        {
            PHPMailerAutoload($classname);
        }
    }

Gives me a SMTP connection failed error