zulip/templates/zerver/emails/missed_message.subject.txt

{% if show_message_content %}
    {% if group_pm %} {% trans %}Group PMs with {{ huddle_display_name }}{% endtrans %}
    {% elif private_message %} {% trans %}PMs with {{ sender_str }}{% endtrans %}
    {% elif stream_email_notify or mention %} #{{ stream_header }}
    {% endif %}
{% else %}
    {% trans %}New missed messages{% endtrans %}
{% endif %}
{% if realm_name_in_notifications %} [{{ realm_str }}]
{% endif %}