app-MAIL-temp/templates/emails/transactional/spoof-reply.html

{% extends "base.html" %}

{% block content %}

  {% call text() %}
    <h1>
      Unauthorized attempt to send an email to {{ contact.email }} from your alias <b>{{ alias.email }}</b> using
      <b>{{ sender }}</b> has been blocked.
    </h1>
  {% endcall %}

  {% call text() %}
    To protect against <b>email spoofing</b>, only your mailbox can send emails on behalf of your alias.
    SimpleLogin also refuses emails that claim to come from your mailbox but fail DMARC.
  {% endcall %}

  {% call text() %}
    Best, <br/>
    SimpleLogin Team.
  {% endcall %}
{% endblock %}