メールの外観を完全にパーソナライズするにはどうすればいいですか？

[Noah]

Horray! I’ve managed to customise the emails by using a custom plugin inspired by:

Replacing email/notification.html via custom Plugin - tips?

I’ve figured out what the issue was. The code for plugin.rb needs to be put inside after_initialize: after_initialize do require_dependency 'user_notifications' module ::UserNotificationsOverride def send_notification_email(opts) Rails.configuration.paths["app/views"].unshift(File.expand_path("../templates", __FILE__)) super(opts) end end class ::UserNotifications prepend ::UserNotificationsOverride end end That’s working fin…

Then I customised the .erb files inside of the templates directory.

A big thanks to all those that helped me!