app/templates/emails/transactional/reply-error.html

{% extends "base.html" %}

{% block content %}
  {{ render_text("Hi") }}

  {% call text() %}
    Your email cannot be sent to <b>{{ contact.email }}</b> from your alias <b>{{ alias.email }}</b>.
  {% endcall %}

  {% call text() %}
    Can you please verify <b>{{ contact.email }}</b> is a valid address?
  {% endcall %}

  {% call text() %}
    Usually this is because the DNS record of <b>{{ contact_domain }}</b> does not exist.
  {% endcall %}

  {% call text() %}
    You can check its DNS record on any DNS checker websites, for example https://mxtoolbox.com/SuperTool.aspx
  {% endcall %}

  {% call text() %}
    Please let us know if you have any question. <br>
    Best, <br>
    SimpleLogin team.
  {% endcall %}

{% endblock %}