zulip/templates/confirmation/confirm_email_change.html

{% extends "zerver/portico.html" %}

{% block portico_content %}

<div class="pitch">
    <hr/>
    <p>
        This confirms that the email address for your Zulip account has changed
        from {{old_email}} to {{ new_email }}.
    </p>
</div>

{% endblock %}