portal/data/mail_template_data.xml

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

        <record id="mail_template_data_portal_welcome" model="mail.template">
            <field name="name">Portal: User Invite</field>
            <field name="model_id" ref="portal.model_portal_wizard_user"/>
            <field name="subject">Your account at {{ object.user_id.company_id.name }}</field>
            <field name="email_to">{{ object.user_id.email_formatted }}</field>
            <field name="description">Invitation email to contacts to create a user account</field>
            <field name="body_html" type="html">
<table border="0" cellpadding="0" cellspacing="0" style="padding-top: 16px; background-color: #F1F1F1; font-family:Verdana, Arial,sans-serif; color: #454748; width: 100%; border-collapse:separate;"><tr><td align="center">
<table border="0" cellpadding="0" cellspacing="0" width="590" style="padding: 16px; background-color: white; color: #454748; border-collapse:separate;">
<tbody>
    <!-- HEADER -->
    <tr>
        <td align="center" style="min-width: 590px;">
            <table border="0" cellpadding="0" cellspacing="0" width="590" style="min-width: 590px; background-color: white; padding: 0px 8px 0px 8px; border-collapse:separate;">
                <tr><td valign="middle">
                    <span style="font-size: 10px;">Your Account</span><br/>
                    <span style="font-size: 20px; font-weight: bold;" t-out="object.user_id.name or ''">Marc Demo</span>
                </td><td valign="middle" align="right" t-if="not object.user_id.company_id.uses_default_logo">
                    <img t-attf-src="/logo.png?company={{ object.user_id.company_id.id }}" style="padding: 0px; margin: 0px; height: auto; width: 80px;" t-att-alt="object.user_id.company_id.name"/>
                </td></tr>
                <tr><td colspan="2" style="text-align:center;">
                  <hr width="100%" style="background-color:rgb(204,204,204);border:medium none;clear:both;display:block;font-size:0px;min-height:1px;line-height:0; margin:16px 0px 16px 0px;"/>
                </td></tr>
            </table>
        </td>
    </tr>
    <!-- CONTENT -->
    <tr>
        <td align="center" style="min-width: 590px;">
            <table border="0" cellpadding="0" cellspacing="0" width="590" style="min-width: 590px; background-color: white; padding: 0px 8px 0px 8px; border-collapse:separate;">
                <tr><td valign="top" style="font-size: 13px;">
                    <div>
                        Dear <t t-out="object.user_id.name or ''">Marc Demo</t>,<br/> <br/>
                        Welcome to <t t-out="object.user_id.company_id.name">YourCompany</t>'s Portal!<br/><br/>
                        An account has been created for you with the following login: <t t-out="object.user_id.login">demo</t><br/><br/>
                        Click on the button below to pick a password and activate your account.
                        <div style="margin: 16px 0px 16px 0px; text-align: center;">
                            <a t-att-href="object.user_id.signup_url" style="display: inline-block; padding: 10px; text-decoration: none; font-size: 12px; background-color: #875A7B; color: #fff; border-radius: 5px;">
                                <strong>Activate Account</strong>
                            </a>
                        </div>
                        <t t-out="object.wizard_id.welcome_message or ''">Welcome to our company's portal.</t>
                    </div>
                </td></tr>
                <tr><td style="text-align:center;">
                  <hr width="100%" style="background-color:rgb(204,204,204);border:medium none;clear:both;display:block;font-size:0px;min-height:1px;line-height:0; margin: 16px 0px 16px 0px;"/>
                </td></tr>
            </table>
        </td>
    </tr>
    <!-- FOOTER -->
    <tr>
        <td align="center" style="min-width: 590px;">
            <table border="0" cellpadding="0" cellspacing="0" width="590" style="min-width: 590px; background-color: white; font-size: 11px; padding: 0px 8px 0px 8px; border-collapse:separate;">
                <tr><td valign="middle" align="left">
                    <t t-out="object.user_id.company_id.name or ''">YourCompany</t>
                </td></tr>
                <tr><td valign="middle" align="left" style="opacity: 0.7;">
                    <t t-out="object.user_id.company_id.phone or ''">+1 650-123-4567</t>
                    <t t-if="object.user_id.company_id.email">
                        | <a t-attf-href="'mailto:%s' % {{ object.user_id.company_id.email }}" style="text-decoration:none; color: #454748;" t-out="object.user_id.company_id.email or ''">info@yourcompany.com</a>
                    </t>
                    <t t-if="object.user_id.company_id.website">
                        | <a t-attf-href="'%s' % {{ object.user_id.company_id.website }}" style="text-decoration:none; color: #454748;" t-out="object.user_id.company_id.website or ''">http://www.example.com</a>
                    </t>
                </td></tr>
            </table>
        </td>
    </tr>
</tbody>
</table>
</td></tr>
<!-- POWERED BY -->
<tr><td align="center" style="min-width: 590px;">
    <table border="0" cellpadding="0" cellspacing="0" width="590" style="min-width: 590px; background-color: #F1F1F1; color: #454748; padding: 8px; border-collapse:separate;">
      <tr><td style="text-align: center; font-size: 13px;">
        Powered by <a target="_blank" href="https://www.odoo.com?utm_source=db&amp;utm_medium=portalinvite" style="color: #875A7B;">Odoo</a>
      </td></tr>
    </table>
</td></tr>
</table>
            </field>
            <field name="lang">{{ object.partner_id.lang }}</field>
            <field name="auto_delete" eval="True"/>
        </record>
    </data>
</odoo>