add some more custom config and put every thing in comment in the custom.yaml template
{% extends "email/base_email.txt" %}{% load i18n %}
{% block content %}
{% blocktrans %}Your text "{{ title }}" has been created.{% endblocktrans %}
{% blocktrans %}To publish it click on the following link:{% endblocktrans %}
{{ site_url }}{{ publish_url }}
{% endblock %}