app/templates/emails/transactional/cannot-create-alias-domain.html

{% extends "base.html" %}

{% block content %}
  {{ render_text("Hi " + name) }}
  {{ render_text("An email has been sent to the alias <b>" + alias + "</b> that would be created automatically as you own the domain <b>" + domain + "</b>.") }}

  {{ render_text("However as your plan is no longer premium, this creation cannot happen.") }}
  {{ render_text('Please upgrade to premium plan in order to use this feature.') }}

  {{ render_text('Thanks, <br />SimpleLogin Team.') }}
{% endblock %}