bank-payment/account_banking_sepa_direct_debit/data/mail_template_data.xml

<?xml version="1.0" encoding="utf-8" ?>
<flectra noupdate="1">
        <record id="email_template_sepa_mandate" model="mail.template">
            <field name="name">SEPA Mandate: Send by email</field>
            <field
            name="model_id"
            ref="account_banking_mandate.model_account_banking_mandate"
        />
            <field
            name="subject"
        >SEPA Mandate {{ object.unique_mandate_reference or 'n/a' }} for {{ object.company_id.name }} is pending to sign</field>
            <field
            name="email_from"
        >{{ object.company_id.partner_id.email_formatted }}</field>
            <field name="partner_to">{{ object.partner_id.id }}</field>
            <field name="body_html" type="html">
<div style="margin: 0px; padding: 0px;">
    <p style="margin: 0px; padding: 0px; font-size: 13px;">
        Hello,
        <br /><br />
        Your SEPA Mandate for <t
                        t-out="object.company_id.name or ''"
                        contenteditable="false"
                        data-oe-t-inline="true"
                    >YourCompany</t> is pending to sign.
        <br /><br />
        Do not hesitate to contact us if you have any questions.
        <br />

    <t t-if="user.signature">
        <br />
        <t t-out="user.signature or ''">--<br />Mitchell Admin</t>
    </t>
</p>
</div>
            </field>
            <field
            name="report_template_ids"
            eval="[(4, ref('account_banking_sepa_direct_debit.report_sepa_direct_debit_mandate'))]"
        />
            <field name="lang">{{ object.partner_id.lang }}</field>
            <field name="auto_delete" eval="True" />
        </record>
</flectra>