WP Mandrill SMTP

<?php

/**
 * Plugin Name: PHPMailer SMTP Settings
 * Description: Enables SMTP servers, SSL/TSL authentication and SMTP settings.
 */

defined( 'ABSPATH' ) OR exit;

add_action( 'phpmailer_init', 'my_phpmailer_init' );

function my_phpmailer_init( PHPMailer $phpmailer ) {

    $phpmailer->Host = 'smtp.mandrillapp.com';
    $phpmailer->Port = 587;
    $phpmailer->Username = '';
    $phpmailer->From = '';
    $phpmailer->Password = '';
    $phpmailer->SMTPAuth = true;
    // $phpmailer->SMTPSecure = 'ssl'; // enable if required, 'tls' is another possible value

    // if ( defined( 'HM_DEV' ) && HM_DEV ) {
    // $phpmailer->ClearAllRecipients();
    // $phpmailer->AddAddress( '[email protected]' );
    // }

    $phpmailer->IsSMTP();

}