odoo16/addons/payment_paypal/data/payment_paypal_email_data.xml

<?xml version="1.0" ?>
<odoo>
    <!-- No longer used, deleted in following version-->
    <template id="mail_template_paypal_invite_user_to_configure">
        <div>
            <p>
                Hello,
                <br/><br/>
                You have received a payment through PayPal.<br/>
                Kindly follow the instructions given by PayPal to create your account.<br/>
                Then, help us complete your Paypal credentials in Odoo.<br/><br/>
            </p>
            <a t-attf-href="/web#id=#{provider.id}&amp;model=payment.provider&amp;view_type=form"
               style="background-color: #875A7B; padding: 10px; text-decoration: none; color: #fff; border-radius: 5px; font-size: 12px;">
                Set Paypal credentials
            </a>
            <p>
                <br/><br/>
                Thanks,<br/>
                <b>The Odoo Team</b>
            </p>
        </div>
    </template>

</odoo>