oca-technical/odoo-bringout-oca-management-system-mgmtsystem_action/mgmtsystem_action/data/email_template.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo noupdate="1">

    <!-- Email template for Action Reminders -->
    <record id="email_template_new_action_reminder" model="mail.template">
        <field name="name">Action Assigned</field>
        <field
            name="email_from"
        >{{object.create_uid.company_id.email or 'noreply@localhost'}}</field>
        <field name="subject">{{object.name}}</field>
        <field name="email_to">{{object.user_id.email}}</field>
        <field name="model_id" ref="model_mgmtsystem_action" />
        <field name="auto_delete" eval="True" />
        <field name="lang">{{object.create_uid.partner_id.lang}}</field>
        <field name="body_html">
            <![CDATA[
<p>Hello <t t-out="object.user_id.name"/>,</p>

<p>A new action has been assigned to you: <b><a t-att-href="object.get_action_url()"><t t-out="object.name"/></a></b></p>
<p><b>Deadline: </b><t t-out="object.date_deadline or ''"/></p>

<p>Please, use the action stages and messages to log progress.</p>

<p>
Thank you<br>
--<br>
Odoo
</p>
            ]]>
        </field>
    </record>

    <!-- Email template for Action Reminders -->
    <record id="action_email_template_reminder_action" model="mail.template">
        <field name="name">Reminder to Responsible</field>
        <field
            name="email_from"
        >{{object.create_uid.company_id.email or 'noreply@localhost'}}</field>
        <field name="subject">Reminder on Action: "{{object.name}}"</field>
        <field name="email_to">{{object.user_id.email}}</field>
        <field name="model_id" ref="model_mgmtsystem_action" />
        <field name="auto_delete" eval="True" />
        <field name="lang">{{object.create_uid.partner_id.lang}}</field>
        <field name="body_html">
            <![CDATA[
<p>Hello <t t-out="object.user_id.name"/>,</p>

<p>
This is an automated message to remind you that the
following action is due to be completed in 10 days (<t t-out="object.date_deadline"/>):

<b><a t-att-href="object.get_action_url()"><t t-out="object.name"/></a></b>
</p>

<p>
Thank you and have a nice day.<br>
--<br>
Odoo
</p>
            ]]>
        </field>
    </record>

</odoo>