Configure WordPress wp_mail function to send through SMTP server http://b.utler.co/Y3

wp_mail_smtp.php

/**
 * This function will connect wp_mail to your authenticated
 * SMTP server. This improves reliability of wp_mail, and 
 * avoids many potential problems.
 *
 * Author:     Chad Butler
 * Author URI: http://butlerblog.com
 *
 * For more information and instructions, see:
 * http://b.utler.co/Y3
 */
add_action( 'phpmailer_init', 'send_smtp_email' );
function send_smtp_email( $phpmailer ) {

	// Define that we are sending with SMTP
	$phpmailer->isSMTP();

	// The hostname of the mail server
	$phpmailer->Host = "smtp.example.com";

	// Use SMTP authentication (true|false)
	$phpmailer->SMTPAuth = true;

	// SMTP port number - likely to be 25, 465 or 587
	$phpmailer->Port = "587";

	// Username to use for SMTP authentication
	$phpmailer->Username = "yourusername";

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

	// Encryption system to use - ssl or tls
	$phpmailer->SMTPSecure = "tls";

	$phpmailer->From = "[email protected]";
	$phpmailer->FromName = "Your Name";
}