Setup MailHog with Lando, Pantheon & WordPress

.lando.yml

name: appname
recipe: pantheon
config:
  framework: wordpress
  site: appname
  id: [side-id]
proxy:
  mailhog:
    - mail.appname.lndo.site
services:
  mailhog:
    type: mailhog
    hogfrom:
      - appserver

functions.php

<?php

function custom_kh_lando_smtp($phpmailer) {
    $phpmailer->isSMTP();
    $phpmailer->Host = 'mailhog';
    $phpmailer->SMTPAuth = false;
    $phpmailer->Port = 1025;
}

add_action('phpmailer_init', 'custom_kh_lando_smtp');

This is very helpful. Thank you!